OK, I'm lost I have seen another forum about this and it was never ending with no real answer.
Should a stock tC not supercharged be running on 91 or 87 octane?
And does the brand of gas really matter?
Of course I know Vons/Ralphs and stuff like that suck, but Arco/Shell/Mobil the big names, what's best and with what octane should the motor use?

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It should be running 91 if that's the highest it goes

 

yea most gas stations around that I go to have 91 as the highest octane...
And thats what im running it on right now,i didnt know if it would be messing up anything or giveing me less gas millage cuase of it.

 

no if ur supercharged go 91

 

if your car is stock or with a few bolt-ons then you should be running 87 but could go for 89 but there won't be a difference, as far as running 91 you only run that if you are supercharged or turbo...other than that you don't have to nor will it give you more power.

 

well im not really looking for more power, Just want to know whats better for the car if either would actually be "better" for it .
its all stock as far as performance no s/c or turbo.

 

i would just put 87 but if you got the few extra bucks to spend for nothing then go for it.

 

in this economy I dont think anyone has a few extra bucks.lol
THanks.
I might change back to 87 my next fill up.

 

87 is the recommended gas for stock tCs

 

if your are not boosted, just 87 is all you need. there is even s freakin sticky about this guys SEARCH!

 

87 is what you need. Unless you're getting pre-ignition pinging, there's NOTHING that a higher octane gas will do for you except cost more money.

And all the gas is refined by two or three companies and sold to all the stations. There are standards thatg t____ all must meet. Other than possible additives, the gas should be pretty much the same.

 

there is a thread on this already..lol i would know

 

yea but that thread turned more into a disagreement and left me confused.
this is what I was looking for, thanks everyone.

 

/thread

https://www.scionlife.com/forums/viewtopic.php?t=253510

If you can't figure out from that thread, you should probably hang up your keys. Seriously. I don't even mean any disrespect with that. It's spelled out in the owner's manual as well. Seems pretty simple.

Brand is a potential issue, but also discussed in that other thread. If you want good stuff, visit toptiergas.com and use one of those brands.