Premium vs regular fuels

[Tcoat]

Originally Posted by PureShield

Haha I don't personally know @Tcoat I'm just relaying the info. I've read different things all over the internet and heard different things in person. I've also read that American gas stations can put lower rated numbers on the pump than what the fuel may actually be and that the sign on the pump is just the lowest of what you may get???? Who knows.

We are the same way. If you read the pump labels they say minimum XX. If it was really that much lower then any cars with non ECU controlled timing would be grenading all the time. We do have some things that are lower for environmental reasons (i.e. benzene and sulphur) but those do not impact the octane rating. They may be picking up on something else but it is not likely octane levels.


As far as "who knows" goes there will be thousands of people since these things are very closely monitored. Nobody would get away with selling sub rated gas for long.

[PureShield]

Originally Posted by Hotrodheart

@tcoat how does it run on maple syrup?

As being from Canada as well I can tell you it runs great but can be a bit sticky.

[Tcoat]

Originally Posted by Hotrodheart

@tcoat how does it run on maple syrup?

Originally Posted by PureShield

As being from Canada as well I can tell you it runs great but can be a bit sticky.

I prefer running moose piss. Mileage isn't as good but easier on the injectors.

[VTEC]

Originally Posted by Tcoat

Why? Unless you are going to tune for it higher octane than 93 does nothing at all for you.

I know that. I said some people in California use a chart that shows them how much of 100 and 91 octane to mix together to get 93 octane. I didn't say anything about going over 93.

[Hotrodheart]

Originally Posted by Tcoat

I prefer running moose piss. Mileage isn't as good but easier on the injectors.

If I was behind a car, I'd rather it was running on maple syrup. Jes sayin...

[CatScan]

Run on alcohol, that's "Supreme"!

[itsAlex]

Originally Posted by PureShield

Except that's based off of American 91 octane not Canadian 91. Canadian 91 is more like 87-89 American.

Originally Posted by Tcoat

No. Canadian octane is measured in AKI exactly the same as the US. So 91 here is exactly the same as 91 there. Don't know where you heard different.

As Tcoat said, both Canada and the US measure their octane ratings using AKI ((R+M) /2). Other countries use methods like RON and MON.

[V_86]

Originally Posted by Packofcrows

93 you'll notice bit more response and better mpg. Thats it. 91 it feels the same as 93 but with about 3-5mpg less. IMO

I only use Shell 91 or Chevron 91. No 93 in central CA

There's no 93 really in any of CA, I've never seen it in Socal. It sucks because I would like the mpg gain and fewer lost ponies to 91.

[PureShield]

Originally Posted by Tcoat

No. Canadian octane is measured in AKI exactly the same as the US. So 91 here is exactly the same as 91 there. Don't know where you heard different.

Originally Posted by itsAlex

As Tcoat said, both Canada and the US measure their octane ratings using AKI ((R+M) /2). Other countries use methods like RON and MON.

I'm just relaying the info I've been getting. Like I said the guys at Drift Office have done extensive testing using Canadian fuel vs American fuel and they find it inferior. For example this one guy in my local club has an FR-S with an Edelbrock supercharger kit and his car tuned and then dynoed at 225whp on Chevron 94 from B.C and around 250whp on Chevron 92 from Washington. These are also a couple of similar topics I've found.

http://www.revscene.net/forums/68154...dien-fuel.html

http://www.e90post.com/forums/showthread.php?t=860059

[mav1178]

Originally Posted by PureShield

I'm just relaying the info I've been getting. Like I said the guys at Drift Office have done extensive testing using Canadian fuel vs American fuel and they find it inferior. For example this one guy in my local club has an FR-S with an Edelbrock supercharger kit and his car tuned and then dynoed at 225whp on Chevron 94 from B.C and around 250whp on Chevron 92 from Washington. These are also a couple of similar topics I've found.

http://www.revscene.net/forums/68154...dien-fuel.html

http://www.e90post.com/forums/showthread.php?t=860059

I never trust a tune.

If someone wants to claim gas is better or worse in an area, please have the gasoline lab results published.

Everything else is indirect and cannot be taken at face value without a large bag of salt.

-alex

[PureShield]

Originally Posted by mav1178

I never trust a tune.

If someone wants to claim gas is better or worse in an area, please have the gasoline lab results published.

Everything else is indirect and cannot be taken at face value without a large bag of salt.

-alex

Hard to not trust tuning your ECU nowadays since it's the best way to get performance gains out of your mods.

[CatScan]

Or you could just put whatever the station has in the car. The thing will run, and you won't kill your car.

[mav1178]

Originally Posted by PureShield

Hard to not trust tuning your ECU nowadays since it's the best way to get performance gains out of your mods.

That's not my point... ECU tune doesn't tell me what octane the gas has, or whether the station had just a bad batch of gas or whether it was systematic in the entire area.

To use ECU tune as a gauge of how good or bad gas is in an area is akin to me gauging the weather of Alaska by seeing what flies over from Siberia...

-alex

[CatScan]

A lawyer made the decision regarding octane, not an engineer.