Gasoline/Petrol Preference

[BYprodriver]

When i worked at Saleen & later Shelby American, assisting in the new vehicle EPA certification process, each company hired an engineer that specialized in EPA certification. Both engineers insisted nothing but Chevron Supreme went in the gas tank.
That's what I use, 91 octane in CA. When I drove my Box from CA to TX & back, I tried some Amaco premium 94 octane which made a very noticeable improvement.

[MarkAP]

93 octane from Costco. Includes ethanol so I only get 18-19 mpg.

[fridsten]

I fill up with 98ROZ when I can, which is almost every time. I've only used 95 once, and just because I was running out of fuel. My parents regularly run their 997C4 on 95, without any problems.

[Benitom]

Chevron...use shell if low on fuel and no Chevron around.

[10/10ths]

Shell V-Power.

Join their loyalty program and get 5 cents a gallon off every fill up.

[Ciao]

91 Ethanol free gas in Lakewood, Colorado, not sure how effectively 93 would burn at high altitude or if it would improve HP at high altitude 5280+ in elevation

[rexcramer]

Chevron 91 and or Shell. The car seems to adjust to the lower rating without issue. It would be nice to try 93, for a couple of tanks, to see the difference.

[Froggo]

The label on my fuel tank door says to use only 98 petrol . Thats what I put in , we have BP 98 Ultimate here its about $2.10/L I think .

[Mig]

I fill up across the border at Texaco. Texaco is owned by Chevron, and has the same additive package in their fuels - Techron.

I know a guy in the industry and he says all base gasoline is the same. It's the additive package that distinguishes one brand from the next.