octane 100 from SHELL

[lspower]

Hi Guys,
I am back again.
After almost 6 months use of octane 100 on my 1990 integra LS(mod chip).
I managed to use 18 liters per 260km(city driving). Which works out cheaper than octan 98 or even unlead. Its cost me 1.35$X(480km/260) X18(liters) =44.9 $ a week. This includes 2-3 time air cond a week for 3-4 hours usage.
As compared to octane 98 = 1.28X480/260 X 22liters = 52$
Unleaded = 1.15 X 480/260 X 24.5 = 67.84$

As you can see, that I pay more for the octane 100, but I actually saved around 7 $ a week as compared to octane 98.

I have to admit, that I am shifting up gears very gently or (every 10 km/h up);
shifting around 2200 rpm. Now and then rev 3000 or twice every allowed to 7200 rpm.
Driving using 5th gear at 50km/h above, crusing around 70 km/h in city(max).

This is what I get. So far.......I dnt have any starting problems or chokes.

[EuroDude]

wow 100octane? sweet!

but I heard that its useless using a higher octane than what Honda recommend. I guess u proved that theory wrong ;)

[fly_vti]

wow 100octane? sweet!

but I heard that its useless using a higher octane than what Honda recommend. I guess u proved that theory wrong ;)

its nothing, i got my car dyno'd and i had no peformance gains. not even 1kw difference from 98 octane.. you need a ecu tuned for it to expect gains.

[ProECU]

but I heard that its useless using a higher octane than what Honda recommend.

It is useless in my opinion.

Unless the ECU is re-tuned, the same fuel and ignition maps are used, so same fuel consumption will result.

[lspower]

thanks for repling.
At this stage, I am only interested in saving $$$s and fuel comsumption.
Thats my whole point.

Dnt worry about the power gain or not. AS LONG as no power loss, RIGHT. but better fuel economy...........

[ProECU]

yes

your response sounds as though you didn't understand my post.

[spetz]

It is useless in my opinion.

Unless the ECU is re-tuned, the same fuel and ignition maps are used, so same fuel consumption will result.


But doesn't the factory ECU compensate for different RON levels in the fuel?

Basically, if it is a low RON, it'll retard timing by itself, and if it's higher RON, it will advance it, giving a bit more power?

[lspower]

good on ya. Thats the right direction.....

[ProECU]

But doesn't the factory ECU compensate for different RON levels in the fuel?

Basically, if it is a low RON, it'll retard timing by itself, and if it's higher RON, it will advance it, giving a bit more power?

I promise not to laugh but...

one thing the ECU does do is adjust the duty cycle of the injectors based on the O2 sensor input. Thats one area which "may" make a difference in fuel consumption.

[lspower]

very interesting and tecnical...please share your experience.

[elim]

It is useless in my opinion.

Unless the ECU is re-tuned, the same fuel and ignition maps are used, so same fuel consumption will result.

agreed, made jack shit difference to my car in terms of milage