Mohawk fuel and Octane Question

[Qualin]

First of all, I'd like to mention that I know this question has been answered a few times, but never quite with the answer that I'd like. I just recently purchased a new 2010 135i to put everything in perspective.

Here in Calgary, AB, most gas stations carry 87, 89 and 91 Octane Fuel. What rating that is, I have no clue, it just says that on the pump. (AKI?)

Now, Mohawk gas stations here sell 90, 92 and 94 Octane. They "Cheat" by putting in Alchohol into the gas. "Environmentally friendly" and all that...

So, my big question is.. Will I see any improvement if I fill up with 94 octane instead of 91 octane, or will I just be throwing my money away?

You see, at Mohawk, 92 octane costs less than 91 octane at other gas stations because it's not considered to be "Premium" fuel, so it's really tempting to fill up with nothing but Mohawk gas.

It seems to be quite happy on a tank of 91 without any noticable pinging noises.

I recall reading on another thread that someone was saying to stay away from gasolines with alchohol in them for fear of HPFP failure.

Opinions?

Thanks everyone.

[Lester]

Mohawk has ethanol. Use Chevron 94 - the pump should say "Does not contain Ethanol". The other grades say "May contain up to 10% ethanol".

[alimjessa]

I only use 94 Octane from Husky. There is only 6 Huskies In Calgary that sell 94 Octane. Your car will have about another 5 - 7 WHP. Theres one in Sundance, One on Macleod and 42nd and I don't know where the other 4 are. If you google it, someone has made a map of the six locations in Calgary. They say it may contain up to 10% ethanol, however it is the best gas in Cowtown

[QuA]

I've been hearing mixed reviews on the 94 octane from mohawk on our 135/335's. i've been using Shell 91 for the past little while with no complaints.

Is too much ethanol bad for our engines?

Originally Posted by alimjessa

I only use 94 Octane from Husky. There is only 6 Huskies In Calgary that sell 94 Octane. Your car will have about another 5 - 7 WHP. Theres one in Sundance, One on Macleod and 42nd and I don't know where the other 4 are. If you google it, someone has made a map of the six locations in Calgary. They say it may contain up to 10% ethanol, however it is the best gas in Cowtown

[Go4Long]

ethanol "enriched" gasolines don't burn quite the same as normal old gas. I used to run a talon running just north of 20 psi. With a data logger you could run identical boost levels and watch your knock count...shell 91 does better than the ethanol 94. But each car reacts differently to the ethanol.

[QuA]

Ahhh interesting information. When we spend this much on gasoline, we should expect the best I'll be doing some logs pretty soon once I get my BT Tool back. Are you picking up a 1 series soon?

[Qualin]

Yeah, I have one now. Thanks for asking. Just thought I'd make sure that I'm putting something in it that it can take advantage of.

[Phased]

I've had issues with a JB3 and Husky Gas in the summer months. A got 3-4 limp modes and stopped using the gas. I forget what codes I got.

[miguex@ecuprogram]

Originally Posted by Phased

I've had issues with a JB3 and Husky Gas in the summer months. A got 3-4 limp modes and stopped using the gas. I forget what codes I got.

The JB3 is not configured to use octane 94. That can be done only by tuning the ECU remapping.

[ZIPNBYE]

Unless you're able to find Chevron 94, which is all-gasoline, running E10 Husky / Mohawk enthanol-blended 94 gasoline will not really give you much of anything over a traditional 91-octane gasoline.

IMO, for what's available to you in Alberta, you're better off with Shell 91. This is from 13yrs of life with a turbo'd 1990 Miata (15psi) -- previous car to current. Two years along with the BMW and no issues.