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View Full Version : Unleaded fuel in VTIR EK4



**Ghost**
23-08-2004, 10:33 AM
as the topic sez my dad was driving my car and put in half a tank of normal unlead.. .91 octane...

does it matter if i drive the tank out? keeping careful not to rev too hard etc etc? or is my engine going to blow up?

thanks guys

ATSE
23-08-2004, 10:41 AM
it should be fine... the ECU will retard the timing... BUT the user manual states a minimum of 95RON... so take it easy this tank... and just top her up the next fill with Optimax/Synergy 8000/Ultimate.

alphabeatsco
23-08-2004, 10:48 AM
is there a certain amount of octane that needs to be to met for EK4?

errr..cos i never know about this..and i got my car second hand..i dont have the manual..

i've got normal unleaded in my car now...
if i fill up with BP GOLD ultimate, what will happen? better performance?

gelo
23-08-2004, 11:13 AM
just start using premium unleaded petrol
of better yet the 98 octane onces

it is better for the engine

eknine
23-08-2004, 12:55 PM
unless you have a missing sticky it would say what type of fuel you should fill up -> located behind the fuel door flap

:eek: which part on the sticky -> you guys don't understand :eek:


---------------------- :D :D :D :D ---------------------------

strafe
23-08-2004, 01:14 PM
If you stay under 4000rpm you should be fine.

luzinit
23-08-2004, 02:27 PM
what if he puts in 98 octane, will it kinda mix to create something inbetween? haha.

fried
23-08-2004, 02:53 PM
lol....

u guys are like adement that he needs to stay under 4000rpm seeing as he is using 91oct. does anyone actually know the facts of this? or the negatives of this? the theory behind higher ron?

this is just all hear-sai.

bennjamin
23-08-2004, 03:10 PM
...your ECU still thinks its running with 96+octane fuel...so in the danger of leaning out high revs etc I would drive like miss Daisy ( ie SLOW and dont "veetech yo!") until empty - THEN fill it up as normal :)
Dont do it again :)

Trust-Me
23-08-2004, 04:07 PM
Add Some Octane Booster If Ur Worried!!!

z3lda
27-08-2004, 12:33 AM
i use 91octane Shell or BP,98 is toooooo expenisve these days.
my car seems fine?

PhatSol
27-08-2004, 12:38 AM
unless you have a missing sticky it would say what type of fuel you should fill up -> located behind the fuel door flap

:eek: which part on the sticky -> you guys don't understand :eek:


---------------------- :D :D :D :D ---------------------------

Yeah my car has a sticker on the back of the fuel door that says Premium Only ;)

2ds
27-08-2004, 02:07 AM
i use 91octane Shell or BP,98 is toooooo expenisve these days.
my car seems fine?

you're a bad person, don't be mean to your car!

-2ds

SPEEDCORE
27-08-2004, 08:58 AM
i use 91octane Shell or BP,98 is toooooo expenisve these days.
my car seems fine?

Which car?? The Delsol?? :(

z3lda
27-08-2004, 08:02 PM
i dont understand why its bad for the car?. its not like its shit petrol. im sure everyday people, who drive stock sport cars pump premiun petrol not 98octane. their cars seem to still run fine. from show room new to 200ks?

PhatSol
27-08-2004, 08:11 PM
i dont understand why its bad for the car?. its not like its shit petrol. im sure everyday people, who drive stock sport cars pump premiun petrol not 98octane. their cars seem to still run fine. from show room new to 200ks?

But 91 Octane isn't premium, 91 octane is only standard unleaded. The B16A2 needs at least premium unleaded because of the high compression. Besides, even if the premium fuel is 10c/L more and you use 2000L/year, thats only an extra $200. Be kind to your sol! :p

SIKCVC
27-08-2004, 08:41 PM
dont ever add octane booster or any such clensing item to your fuel... if you wanna clean your fuel system out, get it done professionally or use optimax as its got all that crap in it but more refined.

I put a booster in my car and fould my plugs... 3 times.

z3lda
27-08-2004, 09:01 PM
whats the best 98 to use? optixmax, synergy 8000 or BP ulitmate.

SIKCVC
27-08-2004, 10:24 PM
theres no one best fuel... its what works best with your car, but it seems B16a's run better on Ultimate.

Setanta
27-08-2004, 11:00 PM
Seeing as my '90 SiR is rated for 98 octane, the big 3's 98 is all that goes in it. Given that the EK4 VTiR's B16A is an ancestor of my gen 1 B16A, I'd be guessing premium is the only way to go to protect the motor.

SPEEDCORE
27-08-2004, 11:54 PM
i dont understand why its bad for the car?.

Knock knock....
Who's there?
Knock!
Knock who?
Knock knock!

:D

You are shittin' us with that comment right?

Setanta
28-08-2004, 12:26 AM
whats the best 98 to use? optixmax, synergy 8000 or BP ulitmate.

I found that the Synergy 8000 was nicest - but I use Optimax as I can get the 4c discount with Coles dockets :D

lol @ Speedcore :D:D:D

PhatSol
28-08-2004, 05:04 PM
I found that the Synergy 8000 was nicest - but I use Optimax as I can get the 4c discount with Coles dockets :D

lol @ Speedcore :D:D:D

Yep, gotta use those Coles dockets :p

ECU-MAN
28-08-2004, 10:00 PM
gee dont even worry about it. Fried your on the ball, drive it any way you want or have to . B16a2 in an EK should have a knock sensor since its an OBDII. it will detect any Knocking and retard the timming. no problems what so ever. even with out a knock sensor, you think everyone with a VTiR uses Premuim,(although they should) Honda would see alot more dead engines if what you guys are saying is right. this has been accounted for by design.

PhatSol
28-08-2004, 10:21 PM
gee dont even worry about it. Fried your on the ball, drive it any way you want or have to . B16a2 in an EK should have a knock sensor since its an OBDII. it will detect any Knocking and retard the timming. no problems what so ever. even with out a knock sensor, you think everyone with a VTiR uses Premuim,(although they should) Honda would see alot more dead engines if what you guys are saying is right. this has been accounted for by design.

So even though it says in the manual and on the fuel door to only use premium, you're telling him to use normal unleaded? I don't get it. The B16A2 is a high comp motor, designed to run on 95 and above. Why would you bother putting in anything less? :confused:

SIKCVC
30-08-2004, 02:01 PM
because theres a lot people out there who DONT read the manual... who went for the VTiR because it had the more "zippier" engine, all the extra features that the other models didn't have. NOT because its a cheap Type R equivilent because honda australia are too stupid to release a decent powered "Race" civic over here.

Honda may be stupid with marketing but not with engine design. Why do you think the ausy B16a are detuned from the JDM's... They've taken into account for the idiots out there who just dont care.

**Ghost**
30-08-2004, 02:22 PM
Well getting back to u guys on this... managed to CLEAN the tank out... basically drove it until it was like no fuel left...and then left it running idle at the petrol station for ten minutes (i bought a magazine) while occasionally revving...

then put in BP ULTIMATE... u wouldnt believe the difference... its altogether a different car...

my advice is that if u want to enjoy ur car, put in the fuel she needs... but if ur strapped for cash, then yes 91 OCTane is fine... i asked my mecahnic and he said exactly wot u guys did... my ECU has a knock sensor...so it basically slows the whoeleeeeeeeee car down when u put in 91 oct... the only "bad" bit is the dirt, which can easily be cleaned with a tank full of optimax..

PhatSol
30-08-2004, 03:34 PM
Honda may be stupid with marketing but not with engine design. Why do you think the ausy B16a are detuned from the JDM's... They've taken into account for the idiots out there who just dont care.

Why are the aussie spec B16A motors de-tuned from JDM's? Because they have 100RON fuel, our premium is only 95-96RON. :rolleyes:

SIKCVC
30-08-2004, 05:51 PM
i think it something along those lines... but our premium is from a stated 95-96 or 98 I know my engine is very temprimental on what petrol i use, as In big differences between brands! I'm not too sure what it has been tuned on be it their regular or premium. From what I've been told their regular is 96-98, so they dont need to compensate for idiots/lazy/poor barstards that dont want to put premium in.

If it was such an issue Honda Australia would have left the tuning at 98. But no, they compensated by lowering red line and tuning for 95. Remember they could have left it at 98. But they know that would comprimise the engine too much as not only enthousiasts would be buying the car, and it is enevitable to get someone who puts 91 octane in. Make sense?

PhatSol
30-08-2004, 06:03 PM
But the thing is, there was no 98 octane when the B16A motor was first released in Australia. 96 was the best grade you could get back then, so Honda had to detune it to run on our crappy premium.

SIKCVC
30-08-2004, 06:05 PM
Not really there was 98 octane in 96.

PhatSol
30-08-2004, 06:13 PM
Not really there was 98 octane in 96.

Yeah but the B16A has been around a lot longer than that...

SIKCVC
30-08-2004, 06:22 PM
Not in australia.

PhatSol
30-08-2004, 06:39 PM
1993 Crx Del Sol.

2ds
30-08-2004, 06:41 PM
why does my '94 AUDM crx have a b16a in it then ? =p

-2ds

2ds
30-08-2004, 06:42 PM
lol, you beat me to it phatsol =D

PhatSol
30-08-2004, 06:42 PM
why does my '94 AUDM crx have a b16a in it then ? =p

-2ds

Lol! Beat you to it :p

SIKCVC
30-08-2004, 07:31 PM
do'h my bad... but remember that was the 117kwt edition. they could have tuned it beter for the vtir. oh well.

2ds
30-08-2004, 10:42 PM
do'h my bad... but remember that was the 117kwt edition. they could have tuned it beter for the vtir. oh well.

can you imagine the confusion if they have have released a car that didn't take normal premium unleaded but only 98ron premium ?

-2ds

ECU-MAN
30-08-2004, 10:55 PM
So even though it says in the manual and on the fuel door to only use premium, you're telling him to use normal unleaded? I don't get it. The B16A2 is a high comp motor, designed to run on 95 and above. Why would you bother putting in anything less? :confused:

Im not telling him to use normal unleaded. I recomend premuim all the way for VTiR's.

SIKCVC
31-08-2004, 01:21 AM
can you imagine the confusion if they have have released a car that didn't take normal premium unleaded but only 98ron premium ?

-2ds


hahaha Ummm that was my point. That people are too stupid to realise the difference and end up putting in the wrong stuff... I was saying that the whole time.

PhatSol
31-08-2004, 08:19 PM
Too stupid to realise the diffrence between two fuel bowsers that say "Unleaded" and "Premium"? Even when it says "Premium Only" on the fuel door? Would somone this stupid even be able to drive a car? :p

ECU-MAN
31-08-2004, 09:26 PM
Too stupid to realise the diffrence between two fuel bowsers that say "Unleaded" and "Premium"? Even when it says "Premium Only" on the fuel door? Would somone this stupid even be able to drive a car? :p


man Iv seen people try to pump super into a unleaded filler, ( funny to watch ) some poeple out there have NFI.

SIKCVC
31-08-2004, 09:36 PM
ECU-MAN is 100% right, theres some real ding dongs out there.

Theres seriously some idiots out there who would be like... yeah thats just a recomendation, its JUST petrol... not like it'll do any damage... what could go wrong. get what I'm saying?

PhatSol
31-08-2004, 10:41 PM
ECU-MAN is 100% right, theres some real ding dongs out there.

Theres seriously some idiots out there who would be like... yeah thats just a recomendation, its JUST petrol... not like it'll do any damage... what could go wrong. get what I'm saying?

Lol, people like that *deserve* to have their engine blown up :p

Anyway, the answer is that the B16 will operate on standard unleaded with timing retarded by the knock sensor. For how long, who knows. The fact that the knock sensor is triggered means that the engine is knocking :(