Help....Chevron 94 or Shell V Power 91
 

Hi there, this is my first post and after waiting 1 year i finally pulled the trigger on a 2017 Toyota 86 special edition. I absolutely love the car and since I got it I have filled 2 tanks with Chevron 94 I live In BC and am fortunate to have that gas as an option. I have read various different opinions about what gas to use in these vehicles but I'm not getting very far with my results and all posts seem to be from 2012 or so. Owners manual states 93 octane but 91 can be used. I have noticed that my tailpipes have carbon build up and there isn't even a 1000kms on the car is this a negative side effect of the 94 octane or is this normal?? Also for the guys running shell V power 91 do you have carbon build up issues or any other issues at all?? I'm looking for everyone's general consensus on what gas has the best overal results regarding gas Mileage, performance and long term reliability.

Thanks everyone for your help with this,

Kevin:thanks:

There was an independent test a couple years back. Shell 93 V power was the best gas then BP 93 in second. Are you unable to get 93 in BC from either company?

I'm using 91from shell, near my area there are no gas station have 94...

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I go for a 50/50 mix of 91 and 94. Bingo instant 185 octane.

E85

Costco premium 93 octane .

Pick whichever is the busiest and sells the most.
Although the different brands may use special additives the fuel itself is all pretty much the same. Most of the rest of it is marketing hype.

Chevron is a blend of 10% ethanol and 93 petro?l

100% normal. That stuff shows up regardless of what gas you use. Clean it off if it bothers you.

Why not a little of both?

Me, I kind of do a "gasoline suicide." I mix some Regular, some Unleaded, a bit more Premium and just a hint of Diesel. Seems to work good!

I forgot to mention here in BC Canada our chevron supreme plus 94 is ethanol free. But I've heard very good things about the Shell 91 V power being also ethanol free. Just wondering if running 91 octane long term will degrade the life of the vehicle..

Read what it says in the manual. I believe, if memory serves, you're supposed to use 93, and 91 for short periods if 93 is not available. There's a page dedicated to fuel in the manual.

The more ethanol the better.

im in alberta and also my gas choices are limited but i stick with shell 91 and no issues

Assuming you have a flex-fuel tune maybe...Id rather just use gas but we don't have ethanol free in Taxachussetts

Nothing to do with the tune really. Just the added knock protection.

That's not exactly what it says. You can use 91 as long as you want.

Note that if you're at a high elevation (in the mountains), 93 octane will almost certainly not be available. That's because at higher altitudes, lower air density makes higher octane unnecessary to prevent knock.

the higher the octane the better. But if you can get shell or bp 93 go with them first.

Shell 91 with vpower for the air miles that I will never use.

For some strange reason, My OFT tune doesn't like Chevron 94 gas as much as 91 Shell according to my data logs...maybe it's the quality of gas.

Funny thing is mine work well on 93 oct, but non ethanol blend and logs looks pretty good

I initially used Chevron 94. Decided to try Shell 91 awhile back and stuck with it since. Gas mileage improved (taking the same route to/from work everyday) and the engine just seems to feel happier with it.

Remember, ethanol is actually an octane booster. Some 94 fuels have it for that purpose.

Once you get above a certain altitude, most gas maxes out at 91 because at altitude the effective compression is lower. Utah, Colorado, most of New Mexico are places where anything above 91 octane is rare.

I use 91 octane non-ethanol which silences my crickets and gives marginally better mpg.

Yup, when I'm somewhere that it's an option I do too. I don't like paying the extra $$ for it but it does help the car to run better. I wouldn't mind if it was available less than 50 miles from home though :sigh:

I'm using 91 from Shell. Nothing problems appear. I couldn't find gas station where have 94 near my home..

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Is this a MON or RON rating? US usually posts (RON+MON)/2. It matters.

I think this is the only accurate way to know the quality of fuel. Data log constantly and know how much ignition advance and knock you typically get during certain ambient temps.