Premium downgrade?

[Herb]

I'm wondering, what is everyone's premium fuel rating where you are?I've noticed over the last two years or so that many local refineries have downgraded the premium fuel from 92 to 91 octane. Not that I expect that one point will have a dramatic impact on my GT, however the manual does call for 92.Consisdering that premium fuel is already over $1.00CAN per litre I'm wondering if brand loyalty is of any use anymore.I've been filling up at Esso for years, but I know that the local Cheveron's premium fuel is still at 92. Only thing is that Esso provides a points system which I have used on occasion to redeem for fuel on a financially lean week.

[AKLGT]

we only have 90 grade here. lately, i've been putting a mix of 89 and 90 in because of the big price differences. may just get some octane booster...

[Herb]

Quote, originally posted by trdvibe »we only have 90 grade here. lately, i've been putting a mix of 89 and 90 in because of the big price differences. may just get some octane booster...Hmm, that's an interesting idea. The Chevron stations here also offer a 94 octane grade. I wonder if there would be any savings mixing a 94 with 92, 91 or 87.

[pissedoffgokart]

I was always told that the octain was related to altitude. It kinda made sense, I could get 93 - 94 octain in New Mexico but here in Denver, you can only get 90-91. I could be completely wrong on this but it makes sense.

[Jahntassa]

Down here in Atlanta they do 87, 89, 93 (I think...) I know the Premium is generally 93, but i've seen it 92 in spots. Unless i've gone stupid and completely forgot.Also, premium is now up to $2.15

[Charlievibe]

I believe ours is 92 here and it is running ~$2.10/gallon, depending on the station.

[Psychobroker]

91 is the best in CA. It's been this way for a few years now, used to be 92.

[MadBill]

.Quote, originally posted by pissedoffgokart »I was always told that the octain was related to altitude. It kinda made sense, I could get 93 - 94 octain in New Mexico but here in Denver, you can only get 90-91. I could be completely wrong on this but it makes sense. There's more air pressure at sea level, so coming down from say 5,000 to 200 feet is like adding a slight supercharge, so the engine needs more octane to prevent detonation. The oil companies take advantage of this to save money by blending lower octane fuels for higher altitudes.

[canadavibegt]

I am a Chevron addict now..... Used to be a Shell guy.....We can get 87, 89, 92 and 94 at most but some only offer 87, 89 and 94....... Personally I use the 92 in my GT....... Once in a while I treat it with some 94......Gas right now is going from 99.9 per liter for 87 to 91.9..... I just bought 92 oct.... for 99.9 in Abbotsford...... yippy........

[Stang2Vibe]

around me, regular is usually 87, mid-grade is 89, and premium is either 92 or 93, depending on the brand. Most Sunoco stations and some BP stations offer 94 as a "Super" grade.For 93 octane yesterday, I paid $2.15 per gallon. Hurry up with the OPEC meeting!

[johnsoax]

Premium (93) is $2.39 here in Chicago land.

[Psychobroker]

Quote, originally posted by johnsoax »Premium (93) is $2.39 here in Chicago land.91 @ $2.54/gal here

[jake75]

Paid 2.09 9/10 Shell 87 in Columbus, OH 5/23. Get a 5% Shell gas rebate using Citibank Shell MC so that helps some. TV station reported other areas of town at 1.99 9/10.

[SWiRv]

Quote, originally posted by pissedoffgokart »I was always told that the octain was related to altitude. It kinda made sense, I could get 93 - 94 octain in New Mexico but here in Denver, you can only get 90-91. I could be completely wrong on this but it makes sense. When I was researching the differences between the 2 engines (Base vs. GT), I spoke with a Toyota mechanic to get his opinion on the octane requirements. Basically, you're right -- altitude makes a difference. He said that you could probably get away with 87-89 up here in the Rockies, but once you reach sealevel, 91 or better will save the engine. Still, he recommends using the appropriate octane fuel.