Hi guys, just was wondering if its ok to use E10 gas in my car? The regular gas around here is 87 octane for regular. Another gas station that has E10 gas is 89 octane for the regular, so i can get the 91+ octane there cheaper but i dont want to hurt anything.

 

All most all gas in Canada is E10 (except premium from a few companies).
It won't hurt anything.

 

Well the only one that says E10 and has 89 octane for regular gas is husky/mohawk. All the rest start at 87 octane and dont say E10 gas

 

They won't actually say E10... they will have a label that says "May contain up to 10% Ethanol", meaning that you can have a blend ranging from E5 to E10.

 

Any car can take up to 10% ethanol easily. Most gas across North America has at that much ethanol in it, regardless of grade. Us west folks call it the "winter blend".

 

Winter blend? Some one got that backwards... ethanol is harder to light off in colder temperatures.

 

So how come the mohawk gas station can sell 89 octane at the same price as 87 octane? Just trying to figure this out so i know which gas to use and which not to use lol

 

I'll point this out for everyone right now....

All gas stations sell a minimum of 87 octane in the 87 pumps. The company adds ethanol based on the average quota they are given, so it ranges from 5% to 10% ethanol. So they can guarantee a minimum of 87 octane at all times in any given pump labeled as such.

Husky/Mohawk always add the same 10% to their gasoline, so they can guarantee an equivalent octane of 89.

To clarify the equivalent part... the added ethanol will cause the gas to act like 89 octane gasoline, as it is less prone to detonation. However, ethanol has less energy than gasoline, so you will not have the same energy per unit volume as pure gasoline.
So there is a toss up, you can run more timing and boost on Exx blend gas, but you are losing energy content... so the gains are debatable.
It's not until you run very high compression and very high boost on pure ethanol (or methanol) that you see the advantage (as in methanol dragsters).

 

so for gas mileage and performance purposes would it be better for me to stay away from their gas?

 

Not here, it ain't. They keep it in to reduce CO ommissions, and in summer they switch it with methanol to reduce pollution. You have to realize, our "colder temperatures" are 75 degree days for the most part.

 

As far as daily driving... it wouldn't really matter.
As far as performance, unless your going to tune your car specifically for that type of fuel, you won't see a difference.

Makes sense.
If it's for emissions reasons.

 

I agree, you will not notice any difference and it is perfectly safe. Here in Missouri it is law that all gas sold for public use is 10% Ethanol. You would have to find "racing" fuel if you don't want ethanol in your gas.

 

Even in Shell V-Power?

Here it's the law that they meet an average... so Shell blends higher in regular and mid-grade gasoline, and uses none in they're premium.