Ethanol and the Euro

[xxb4xx]

Guys,

Not sure if this has been covered..

Car states it must have a minimum RON of 95 octane,

Ethanol E10 - 95 RON : Will the car like it or nope?

Did they design the K24A to handle it?

Anyone else tried it?

[HunterZero]

Euro runs fine on E5 or E10, but...

I would avoid ethanol purely for fuel economy issues. It has a lower energy density. Long-term effects of using ethanol aren't really known at this stage.

Who has a 95 RON E10?? Every fuel station I have seen only has standard (91 RON?) E10 unleaded, which is so bad for fuel economy it's worth it to use the non-E10 91 RON petrol no matter what car you drive, even with the price difference. You spend more in fuel per km using E10 than you do on the standard 91 RON stuff.

So if there is such an animal as 95 RON E10, I'd expect unless the E10 is more than 5c/L less than the non-E10 stuff, it would not be worth it.

Stick with 95 RON, or treat your car occasionally and get some 98 RON (BP, Mobil or Caltex). Especially if you have a CU2 Euro (latest model).

- HZ

[HunterZero]

FYI...

http://www.fcai.com.au/publications/all/all/all/3/capability-of-vehicles-to-satisfactorily-operate-on-ethanol-blend-petrol

- James

[xxb4xx]

Thanks heaps Hunter..

There is a few Servo's I seen lately with the Ethanol blend 95.. (it might not be 10% blend though) and yep it's a couple cents more than the Ethanol 91..

I only have ever poured 98ron in the euro, and only ever use BP.. used to it from the Liberty B4, it had a hearty diet of only BP Ultimate... and so did my V8 VL.

But If worst came to worst, and I could only pour ethanol, as it was the only 95 blend, I'd like to know I was safe..

p.s, awesome link.. I see the Euro is rated fine for E5 and E10... wonder if Avgas would be safe LOL a 1:10 ratio!

[aaronng]

My Euro usually uses only 98 RON. Once in a while I am forced to use 95 RON in the country side. There have been 2 times where I went for E10 95 RON and I have to say that fuel economy was poorer and the engine ran rougher. I would go for 95 RON first before I would go for E10 95 RON. Having said how bad E10 95 RON was, my engine did not blow up. After driving a full tank's worth of 98 RON, the engine became smooth again.

[xxb4xx]

Maybe a full tank of ethanol and a bit of octane boost may be a winner? haha

[CivicSi]

Maybe a full tank of ethanol and a bit of octane boost may be a winner? haha

I hear NOS energy drink does wonders...... :P

[OMG.JAI xD]

I get the feeling ethanol mixed fuel and octane boost dont go so well together.

And besides. Do the math.
91RON + 7 points from octane boost = 98RON.

Price of octane boost = 20-30RRP.
Price of 91ron ethanol unleaded. 105-120c/L


Ive known of ethanol damaging fuel pumps. (These are on cars made before e10 was invented).

Only ethanol based fuel id recommend is e85. But your car needs to be tuned on that, Or else you risk blowing up the motor.

=]

[johnprocter]

why would u want to use ethanol in your euro anyway ?

[aaronng]

I get the feeling ethanol mixed fuel and octane boost dont go so well together.

And besides. Do the math.
91RON + 7 points from octane boost = 98RON.

Price of octane boost = 20-30RRP.
Price of 91ron ethanol unleaded. 105-120c/L


Ive known of ethanol damaging fuel pumps. (These are on cars made before e10 was invented).

Only ethanol based fuel id recommend is e85. But your car needs to be tuned on that, Or else you risk blowing up the motor.

=]

E85 is 85% ethanol. E10 is 10% ethanol. E85 has a much much higher chance of damaging seals in fuel pumps and fuel lines. In fact on Honda cars in Australia, E85 will damage the seals. Honda Australia has announced that only up to E10 is acceptable on Honda vehicles from 2003 onwards.

[tony1234]

Euro runs fine on E5 or E10, but...

I would avoid ethanol purely for fuel economy issues. It has a lower energy density. Long-term effects of using ethanol aren't really known at this stage.

Who has a 95 RON E10?? Every fuel station I have seen only has standard (91 RON?) E10 unleaded, which is so bad for fuel economy it's worth it to use the non-E10 91 RON petrol no matter what car you drive, even with the price difference. You spend more in fuel per km using E10 than you do on the standard 91 RON stuff.

So if there is such an animal as 95 RON E10, I'd expect unless the E10 is more than 5c/L less than the non-E10 stuff, it would not be worth it.

Stick with 95 RON, or treat your car occasionally and get some 98 RON (BP, Mobil or Caltex). Especially if you have a CU2 Euro (latest model).

- HZ
^^^^As above E10 is shit and IMO a waste of time and money.Use 98 or at least 95 RON.Any of the fuels on the market are fine (except Shell)

[my_vtec77]

why would u want to use ethanol in your euro anyway ?

:thumbsup: 98 RON atw...

Hey Tony,
Is Shell's 98 really that bad? Coz I've been using it for ages. But i tried BP or Caltex sometimes. I dont feel any difference. May be it's time for me to switch.

[tony1234]

:thumbsup: 98 RON atw...

Hey Tony,
Is Shell's 98 really that bad? Coz I've been using it for ages. But i tried BP or Caltex sometimes. I dont feel any difference. May be it's time for me to switch.
Like i've said before i've heard from sources who i believe to be reliable that it is not the best fuel out there.Personally i haven't used it for a number of years so therefore haven't had any problems with the fuel.

[xxb4xx]

I back the claims that Shell is rubbish.. It really is the worst garbage passed off as fuel

[HunterZero]

I used to use Shell Optimax in my old Accord, and it used to be really good - but at some point just before they phased out Optimax for V-power, it seemed to change, and wasn't as good. Was getting less kms per tank. I tried BP Ultimate and it was just... Better. So I swapped to using that.

I've only put BP Ultimate in my Euro, and one thing I've noticed is how clean a fuel it is. There's no soot whatsoever on the exhausts.

And if you can find it, there is V-power Racing E5, but I'd avoid that too. Or did Shell phase it out?

- HZ

[xxb4xx]

I agree, Optimax was better.. then theyh made V-power and went down hill..

But BP is still the winner for me, if no BP available, Caltex Vortex 98 is great guns too.. but not as good as BP.

[tron07]

lots of ethanol discussions.....

http://www.ozhonda.com/forum/showthread.php?t=105012

http://www.ozhonda.com/forum/showthread.php?t=99698

http://www.ozhonda.com/forum/showthread.php?t=71712

http://www.ozhonda.com/forum/showthread.php?t=91663

http://www.ozhonda.com/forum/showthread.php?t=72902

http://www.ozhonda.com/forum/showthread.php?t=71986

http://www.ozhonda.com/forum/showthread.php?t=56208

http://www.ozhonda.com/forum/showthread.php?t=39950

[Psy]

Are you guys sure you can put normal Unleaded into the Euro?

The little sticker says otherwise.

[Ken-f]

Lol. Have you been putting it into your euro?

IIRC, the manual says 95 ron. which is PULP.

[tron07]

At the petrol flap thingy, it says E10 ready or something

[xxb4xx]

Don't think the Euro says E10 ready though.. it just says premium 95 or something..

My B4, used to state 98 RON only! :) maybe I should post some pics of the big boy before I sold it.. kinda miss the twin turbot power, Vtec doesn't cut it.

[aaronng]

http://www.honda.com.au/wps/wcm/connect/internet/Honda.com.au/Home/Owners/Ethanol/

You can use up to E10, as long as you fulfil the minimum RON requirement of 95.

[tony1234]

Don't think the Euro says E10 ready though.. it just says premium 95 or something..

My B4, used to state 98 RON only! :) maybe I should post some pics of the big boy before I sold it.. kinda miss the twin turbot power, Vtec doesn't cut it.
Post up some pics and tell us all the mods you did to it.

[Crapdaz]

xxb4xx - i would have stuck with the B4 but as you said previously to me you had alot of problems with it.....too much boost your bolts were all coming loose :p

[xxb4xx]

xxb4xx - i would have stuck with the B4 but as you said previously to me you had alot of problems with it.....too much boost your bolts were all coming loose :p


You are very very right mate.. 2 gearboxes was the final straw, when I get on the pc and not the iPhone I'll get some pics linked and the list of mods :)

it used to run 21psi if that gives you an idea! :)

[by-life]

After last dealer service, I found they put a new tag on the fuel cover, which shows E10 is suitable.

Does it mean my cl9 is availabe for 91 RON? But the original sign say only 95 RON or over is suitable for CL9.
How did the dealer make my CL9 to use E10?

I add the full tank of E10 today and have a look how is going.:confused:

[my_vtec77]

C'mon dont be stingy for few bucks on fuel.
Treat her right. She will perform good :P
I give her only 98 ron since she was born. She still good as new after 5 years.

(NB: 'She' refers to my CL9 as I treat like my baby)

[tony1234]

C'mon dont be stingy for few bucks on fuel.
Treat her right. She will perform good :P
I give her only 98 ron since she was born. She still good as new after 5 years.

(NB: 'She' refers to my CL9 as I treat like my baby)
I agree.Don't be stingy.i wouldn't run that shit(E-10) in my lawnmower.:thumbdwn:

[aaronng]

After last dealer service, I found they put a new tag on the fuel cover, which shows E10 is suitable.

Does it mean my cl9 is availabe for 91 RON? But the original sign say only 95 RON or over is suitable for CL9.
How did the dealer make my CL9 to use E10?

I add the full tank of E10 today and have a look how is going.:confused:
Your Euro needs a minimum of 95 RON. So if you use E10 (which it can), you need to use 95RON E10, not the 91RON E10.

If you used 91RON E10, quickly top it up with some 98RON when you can to bring the bulk octane rating up. Otherwise you can risk the engine pinging when under load.

I've used 95RON E10 and it was very rough and had worse fuel consumption. I remember doing the calculations and the $ per km for 95RON E10 was the same as using 98RON. So I just stuck with 98RON since there is less chance of pinging on a very hot day driving uphill in a gear that is too high. :)

[by-life]

Your Euro needs a minimum of 95 RON. So if you use E10 (which it can), you need to use 95RON E10, not the 91RON E10.

If you used 91RON E10, quickly top it up with some 98RON when you can to bring the bulk octane rating up. Otherwise you can risk the engine pinging when under load.

I've used 95RON E10 and it was very rough and had worse fuel consumption. I remember doing the calculations and the $ per km for 95RON E10 was the same as using 98RON. So I just stuck with 98RON since there is less chance of pinging on a very hot day driving uphill in a gear that is too high. :)


I see, thanks for your advise. The tag only mentioned E10, who know it points 91 or 95 without your notes? The dealer should not put the E10 only, they should put 95 E10 but they did not.

I have just add full of tank of 91E10, when it becomes half of tank and then mix with 98Ron. I am afraid my cl9 engine now.

Thanks again, and Happy New Year!

[tony1234]

I see, thanks for your advise. The tag only mentioned E10, who know it points 91 or 95 without your notes? The dealer should not put the E10 only, they should put 95 E10 but they did not.

I have just add full of tank of 91E10, when it becomes half of tank and then mix with 98Ron. I am afraid my cl9 engine now.

Thanks again, and Happy New Year!
Your engine will be OK as long as you don't drive it too hard.Just cruise around till you get to 1/2 a tank and as Aaron said fill up with 98.

[SPQR]

Or use an octane booster if you can't wait to drink half a tank.

http://www.nulon.com.au/products/Pro-Strength_Octane_Booster/

Or add toluene (methyl benzene) once you've used 1/10 of a tank but beware that the stuff is a known carcinogen in the State of California

[aaronng]

Or use an octane booster if you can't wait to drink half a tank.

http://www.nulon.com.au/products/Pro-Strength_Octane_Booster/

Or add toluene (methyl benzene) once you've used 1/10 of a tank but beware that the stuff is a known carcinogen in the State of California

That stuff might cause more deposits and long term issues with the valve seals than running on 91RON E10 fuel gently for half a tank.

[Type R Positive]

You aren't saving anything by using E10 95.

I filled up the hire car 3 days ago and got significantly less km's out of the tank than what im getting now on normal 95. I'm horrorfied by the difference.

[SPQR]

That stuff might cause more deposits and long term issues with the valve seals than running on 91RON E10 fuel gently for half a tank.

The post was intended as a stop-gap solution for the inadvertent use of 91RON ULP. Not a long term proposition at all as toluene, even if just inhaled, is metabolised in the liver and it don't do it any good: As I said, it's a known carcinogen.

[blk05gli]

i run avgas, just kidding. hehehe

[seanneko]

Has anyone actually done a proper comparison between E10 and 95RON as far as economy goes, or are there just lots of rumours like "yeah I think it gets worse economy on E10"?

I've been testing both fuels over the past few weeks and honestly can't tell the difference between them - I get spot on 10L/100km from both E10 and 95 in city driving (short trips, mostly under 5km). I do realise that E10 will get worse economy because the petrol is lower density or whatever, but given that the difference is so small that I can't notice it, and it costs about 20c/L less, for now I will be sticking with E10.

[aaronng]

Has anyone actually done a proper comparison between E10 and 95RON as far as economy goes, or are there just lots of rumours like "yeah I think it gets worse economy on E10"?

I've been testing both fuels over the past few weeks and honestly can't tell the difference between them - I get spot on 10L/100km from both E10 and 95 in city driving (short trips, mostly under 5km). I do realise that E10 will get worse economy because the petrol is lower density or whatever, but given that the difference is so small that I can't notice it, and it costs about 20c/L less, for now I will be sticking with E10.
I have done a comparison between United 95RON with 10% ethanol vs Caltex Vortex 98. Fuel consumption difference was about 0.7L/100km if I remembered correctly (9.4L/100km with Vortex98 vs 10.1L/100km). That is about a 10 cent per litre difference in terms of distance driven per litre (If Vortex98 was $1.30 per litre, then United 95RON-ethanol had to be cheaper than 1.30 x 10.1 / 9.4 = $1.209 to make it worth it). As a result, I decided to stick to Vortex98.

[Type R Positive]

Has anyone actually done a proper comparison between E10 and 95RON as far as economy goes, or are there just lots of rumours like "yeah I think it gets worse economy on E10"?

I've been testing both fuels over the past few weeks and honestly can't tell the difference between them - I get spot on 10L/100km from both E10 and 95 in city driving (short trips, mostly under 5km). I do realise that E10 will get worse economy because the petrol is lower density or whatever, but given that the difference is so small that I can't notice it, and it costs about 20c/L less, for now I will be sticking with E10.I don't see how anyone can think they are saving money using that crap, let alone the damage it does to your car.
I filled up with that crap once at the start of the year in a hire car going up the QLD coast. Man, didn't last long, it guzzled it. Filled up with normal 95, fuel economy was good again.

[Type R Positive]

i run avgas, just kidding. hehehe
I do run that stuff, but in my bike!

[praja6]

Guys E10 petrol can damage the Euro engine. I don't think its worth trying to save 10 or 100 on using E10 fuel

[SPQR]

I have done a comparison between United 95RON with 10% ethanol vs Caltex Vortex 98. Fuel consumption difference was about 0.7L/100km if I remembered correctly (9.4L/100km with Vortex98 vs 10.1L/100km). That is about a 10 cent per litre difference in terms of distance driven per litre (If Vortex98 was $1.30 per litre, then United 95RON-ethanol had to be cheaper than 1.30 x 10.1 / 9.4 = $1.209 to make it worth it). As a result, I decided to stick to Vortex98.

I wish we could get 98 RON so cheap. Ordinary 91 RON is $1.31 up in Darwin. 95 RON is $1.41. 98 RON is $1.60 and you can only get BP Ultimate.

[Lochstar_69]

^^^^As above E10 is shit and IMO a waste of time and money.Use 98 or at least 95 RON.Any of the fuels on the market are fine (except Shell)

Shell V-Power + and BP Ultimate are the only two i use...... havnt had any problems with my car, no pinging or anything....

[praja6]

I understand the premium fuel is expensive. I use BP ultimate only. Not sure which Fuel dealer filled in for me when i bought the car..No problem for me at all..

[10KRPM]

Guys E10 petrol can damage the Euro engine. I don't think its worth trying to save 10 or 100 on using E10 fuel

Is that from the standpoint that you have seen the damage to the cylinders and bores of the k24 from using e10 fuel?

I have used it for the last month or so and havent noticed a difference. My wife and i drive the car during the week and so different driving styles.

[HunterZero]

Is that from the standpoint that you have seen the damage to the cylinders and bores of the k24 from using e10 fuel?

I have used it for the last month or so and havent noticed a difference. My wife and i drive the car during the week and so different driving styles.

E10 won't damage the cylinders and bores instantly, and you certainly wouldn't notice any difference in only a month. Ethanol is a solvent, and will attack plastics and rubbers, eg seals and tubing in the engine. While the Euro engine is supposedly fine for use with E10, you will experience shortened lifespan of engine fuel line components such as fuel pumps and seals. Ethanol fuel attracts water too, so there is more chance of corrosion damage inside your engine over time. And it can cause increased carbon deposits, which can reduce engine performance and lifespan.

You will most certainly get worse economy with E10 fuel than any other fuel, and infact the current pricing of E10 means you will pay less per km using 91 non-ethanol petrol than E10. So it's cheaper to use unblended 91 RON, and better for your engine in the long run. And the Euro K24A engine is highly tuned, and Honda recommend 95 or 98 petrol anyway. The car will run much smoother on higher octane.

The trip meter in the car isn't the most accurate way to measure fuel usage.

It's annoying that the government is now propping up the ethanol industry by removing 91 standard unblended unleaded from sale in NSW, and forcing this less efficient E10 fuel onto motorists.

It's only benefit is it is 'renewable', becaues the ethanol comes from fuel crops. If you want to use any old crap in your car, get a diesel.

So my car only ever runs on BP Ultimate.

- HZ

[Type R Positive]

I wish we could get 98 RON so cheap. Ordinary 91 RON is $1.31 up in Darwin. 95 RON is $1.41. 98 RON is $1.60 and you can only get BP Ultimate.
On a side note.....

When I loaded 1,000,000,000 litres of diesel for Ausfuel the other day, I asked the blokes about Darwin's fuel supply. They said they supply all servo's except for the 2 wollies Caltex's and Shell.

[Type R Positive]

Is that from the standpoint that you have seen the damage to the cylinders and bores of the k24 from using e10 fuel?

I have used it for the last month or so and havent noticed a difference. My wife and i drive the car during the week and so different driving styles.
Well, at the last work, we had to run a special alcohol specific oil, corossion inhibitor, and the run times went down quite dramaticly when we had to use that shit.

[Type R Positive]

It's only benefit is it is 'renewable', becaues the ethanol comes from fuel crops. If you want to use any old crap in your car, get a diesel.
And those 'renewable' crops make more CO2 than petrol!!!

And get an old diesel, not a new one! Anything other than fresh clean diesel = failure.

[d_evilz]

Shell V-Power + and BP Ultimate are the only two i use...... havnt had any problems with my car, no pinging or anything....

im using shell v-power aswell, so far no problem.

[Nairda]

Unfortunately i forgot about the 95 and put half a tank of normal shell unleaded 91....any side effects or as long as i dont keep using 91?

Is there any fuel company that does 95 normal unleaded or does it have to be premium? Im a student and dont have a job so im not so eager to use premium just yet.

I noticed some of you guys feedback of shell having bad fuel? I had a comparison of Safeway caltex and shell and i found shell to give me more mileage (that is normal unleaded)

And whats the deal with V-Power? Does it just not deliver as much power or is it bad fuel eco?

[Type R Positive]

Unfortunately i forgot about the 95 and put half a tank of normal shell unleaded 91....any side effects or as long as i dont keep using 91?

Is there any fuel company that does 95 normal unleaded or does it have to be premium? Im a student and dont have a job so im not so eager to use premium just yet.

I noticed some of you guys feedback of shell having bad fuel? I had a comparison of Safeway caltex and shell and i found shell to give me more mileage (that is normal unleaded)

And whats the deal with V-Power? Does it just not deliver as much power or is it bad fuel eco?
A once off with 91 will be fine, although your car might ping a bit.
95 = premium. It's just what they call it.
v-power is like BP ultimate. The real 'premium' fuel. You should get a bit more milage out of it too.

[praja6]

[QUOTE=Type R Positive;2813540]A once off with 91 will be fine, although your car might ping a bit.

Makesure if your car ping with ping issue and when take it for the dealer for fix, don't mention you fill your half tank with regular unleaded.....

I don't know i use BP ultimate so far good....How about mobile petrol guys, the 8000 something. I use the mobile 8000 for my petrol lawn mower. There is a mobile petrol station just 3mins from my home, i have to go to BP station around 20mins drive to get BP ultimate for my euro

[Type R Positive]

I don't know i use BP ultimate so far good....How about mobile petrol guys, the 8000 something. I use the mobile 8000 for my petrol lawn mower. There is a mobile petrol station just 3mins from my home, i have to go to BP station around 20mins drive to get BP ultimate for my euro
mobil 8000 is a great fuel....from what I can remember! try it out and compare.

[aaronng]

All the 98s are good. Even V-power is better than the 95 from the other stations in terms of detergents and cleaning agents used. For everyone, try a tank or two of 98 RON and calculate the extra mileage compared to regular 95 RON. There is a small difference because fuel in the petrol station's tanks can be old and as a result becomes borderline in terms of octane rating. The engine's knock sensor might detect minor pinging and add in more fuel to prevent it from happening, thus increasing your fuel consumption. When I did my testing, I found that in low load freeway driving that there was no difference between 95 and 98 RON. It was only in city driving where I used more acceleration from stops where 98 RON had a slightly better fuel efficiency. When I did the sums, the $ per km was the same between the 95 and 98 RON, so I stuck with 98 instead.

[xxb4xx]

What's everyone's thought on the new E85 coming out? 85% Ethanol!, it would smell like fairy floss out the exhaust

[Type R Positive]

What's everyone's thought on the new E85 coming out? 85% Ethanol!, it would smell like fairy floss out the exhaust
Absolutely fantastic for turbo cars.....

[xxb4xx]

Absolutely fantastic for turbo cars.....

Is there Sarcasm in there? lol

I let my parents borrow my Subaru B4 once whilst going on holiday, my old man put 91ron in it for 1 tank, the car was pinging it's **** off at 2000rpm!

[aaronng]

Is there Sarcasm in there? lol

I let my parents borrow my Subaru B4 once whilst going on holiday, my old man put 91ron in it for 1 tank, the car was pinging it's **** off at 2000rpm!

Yeah, It may be E85 but if the octane rating is still 91RON, it will ping.

[aaronng]

What's everyone's thought on the new E85 coming out? 85% Ethanol!, it would smell like fairy floss out the exhaust

I reckon the seals in the fuel line will start cracking within 1-2 years.

[Type R Positive]

Is there Sarcasm in there? lol

I let my parents borrow my Subaru B4 once whilst going on holiday, my old man put 91ron in it for 1 tank, the car was pinging it's **** off at 2000rpm!I was actually serious.
Heaps more power when tuning on e85.

don't confuse e85 with 91 either.....

[SPQR]

Yeah, It may be E85 but if the octane rating is still 91RON, it will ping.

True. A RON is a RON. But Ethanol has a RON of 129. If it's used to make up 85% of the fuel and the RON is still only 91 then the petrol component must be low grade in terms of RON but have a higher calorific value.

I thought the intention of E85 is to have a higher RON so that car manufacturers can take advantage of this and compensate for the lower calorific value of ethanol by using higher compression ratios.

Does anyone here read Brazilian Portuguese?

Late breaking news:

http://www.iowarfa.org/PDF/E85_values_fund/E85%20Fact%20Sheet.pdf

http://www.racq.com.au/motoring/cars/car_advice/car_fact_sheets/ethanol_blends_and_octane_number**

It appears that E85 has an Anti-Knock Index (Pump Octane Number) of 94 to 96. This is not the same as Research Octane Number (RON) used everywhere in the world except the Americas. The RACQ seems to think that its wiser to assume that blended ethanol fuels have a RON of 91** (like ULP) but this might not be the case for E85 with it's substantially higher ethanol content: The RON for E85 could be as high as 101; so good news for turbo cars.

** Don't use ethanol (E10) blended fuel quoted as RON 95 as a substuitute for Premium Unleaded as it is not classed as a Premium grade fuel.

[aaronng]

It appears that E85 has an Anti-Knock Index (Pump Octane Number) of 94 to 96. This is not the same as Research Octane Number (RON) used everywhere in the world except the Americas. The RACQ seems to think that its wiser to assume that blended ethanol fuels have a RON of 91** (like ULP) but this might not be the case for E85 with it's substantially higher ethanol content: The RON for E85 could be as high as 101; so good news for turbo cars.

** Don't use ethanol (E10) blended fuel quoted as RON 95 as a substuitute for Premium Unleaded as it is not classed as a Premium grade fuel.
A PON of 91 is equivalent to a RON of 98.
Roughly, the equivalent of PON in RON is:
87 PON = 91 RON
89 PON = 95 RON
91 PON = 98 RON

So 94 PON should be about 102 RON and 96 PONON even higher at 105 RON.

[SPQR]

A PON of 91 is equivalent to a RON of 98.
Roughly, the equivalent of PON in RON is:
87 PON = 91 RON
89 PON = 95 RON
91 PON = 98 RON

So 94 PON should be about 102 RON and 96 PONON even higher at 105 RON.

Apparently it's not quite that easy when ethanol is added to petrol as ethanol doesn't necessarily increase the MON (Motor Octane Number). The PON (Pump Octane Number) used in the Americas is the mean of the MON and the RON i.e. (MON + RON)/2 = PON. So quoting a PON of 94 for the blend tell us nothing about what the MON or RON might be. There is not enough information. You'd have to also know the MON, RON and PON of the added petrol and you cannot assume that it would be any of the available grades as the petrol refiner might use a lower grade to blend with the ethanol.

FYI, Ethanol MON = 116, RON = 129 and PON = 122*

* http://en.wikipedia.org/wiki/Octane_rating