I have used Mobil/Exxon, BP, Texaco, Chevron, 76, Circle K, and Shell for extended periods and in 18 states and one province without any discernable difference between them or between stations or tank fills. The only problem I have ever had was Arco. Put some of their **** in my tank 'cos I was lost in L.A. and on fumes... from the moment I left the station there was a noticeable hit in performance. That car would also have idle and hesitation issues when switching octanes, but had the same trouble using the same octane of that Arco (dare I say) gas. Never tested it with another tank to see if it was a fluke, but with all the other choices that work perfectly, why bother?

 

Mobil Exxon And Hess.great Quality And American Owned.

 

I use anything but Citgo as it is owned by the Government of Venezuela and their leader is as about as anti-American as you can get.

 

Thanks for the input, but so fr it seems like most people's responses are all based on personal preference or a single bad experience. What I'm wondering is, does anyone has an specific knowledge about how to know which gasoline is actually the best for your engine? Perhaps an informed opinion based on facts. For instance, Ford recommends BP, but that's just because they have some sort of a corporate partnership. What reason do we have, as consumers, to think that this "Top Tier" rating system is anything different?

Perhaps there is no way but experience, and if so, okay, but still wondering...

 

who has 91 oct? Out of convenience and habit, i stop at the same chevron station. And it has 87, 89, and 93.

 

I Have Owned A Mobil Station Since 1979 Up Until Exxon Bought Mobil. Until Then Quality Second To None In Fuel And Lubes. Now Most Oil Companies Contrac Out. So Ask Your Station Owner If The Station Is Direct Or Distributor Or Contrac. See Who Suppies The Area Because They All Buy From One Another Some Add Some Additive To Make A Differance?? Its All About Price Today With Mega Retailers. Who Has The Best Price Usually Gets The Contrac. Their Alot More To This But It Become Complicated.

 

Chevron if I can find one in the Edmonton area. Mostly Esso or Husky. Shell is not recommended do to sensor problems.

 

To keep it short. My dad has chased buisness for some of the biggest companies associated with refining gasoline. Brown & Root in the past, specifically. He's partly responsible for a lot of the refining plants used today in North America.

I don't know about you, but I would trust someone in his position about this subject.

He told me he would smack me in the head if he ever caught me putting Valero in the mustang. The way their plants are designed they get too much sulfer in their final mixture which is very bad for motors. Same goes for most of the cheaper gas stations. He told me to stick with Exxon and Chevron/Texaco. I don't buy Conoco because they are Venezuelan. Lets keep the money in the US right?

 

I use ENTEC it is a top tier gas that is very good in my cars. And it is price competitive with the cheapest gas stations and 93 octane is availible at all stations... I might need to give Bamachips a call...

 

That really shouldn't be an issue any longer. Per EPA regulations, all gasoline sold after January 1, 2004 must be a low sulfer formulation. All refiners must meet or exceed the same spec.

 

Top Tier is based on testing not feelings, but they only get the rating if all grades of gas comply.
Again, read the testing section at the web site. http://www.toptiergas.com/
Mobil and Exxon (if I remember correctly) have the proper additives in the higher octane grades (some others may also). If you have a tune for that it should be fine to use.
My car runs on 87 octane and I want to make sure I use a gasoline that is not lacking in proper additives.

 

I just filled up at Sams club. 10 cents cheaper then anywhere else.

 

BP 92 -No problem putting down 403rwhp!

 

What sensor problems?

 

Um theres a difference between acceptable, good, and great? That's like saying getting an A and a D in school are the same thing because they are both passing grades.

 

That's not even a valid comparison. According to the EPA, the only "passing grade" is to meet the spec. Period. I seriously doubt the ones that meet the spec are creating gas that is damaging your engine. If you've got some kind proof to back up your claim, I'd love to see it.

 

THINK, please. I'm sure some gases meet the spec and they are acceptable. I'm also sure some gases are better than the spec and are better for your engine. Just because there is a spec, doesn't mean it's an acceptable spec FOR ME. Honestly if I wasn't racing this car I wouldn't really care. In my normal cars that I drive around, I put all kinds of gas in, but I don't really care about their quality either. Go ahead and use whatever gas you want. I'm just here saying incredibly useful information from an expert on the subject that I trust. If you don't want to accept it, fine. But don't try and tell me it's wrong just because "you think so".

 

First, you don't need to act condescending to make your point. Second, calm down. I'm not trying to pick a fight with you. When I said I would love see any info you have, I meant it. I do know a bit about the petrochemical business since I work for one of the worlds largest oil comanies in one of their major refineries. I'm not a chemical engineer but I do know about gasoline blending. I'd be interested to hear what you know about it.

 

this is alittle off topic but any one in HURRICANE alley should go fill up all there cars and gas cans. Gas will jump as soon as ERNESTO makes landfall.

 

Personally I know nothing. I'm just passing along info I got from a VERY reputable source. Since you're in the buisness you might know who my dad is.