which brand of gas?
I use mainly Shell and Chevron. I tend to like the Chevron more, but can't always get it.
And the no-names like Costco, 7-11 and the other Minimarts are at 10%.
Chevron Premium with no ethanol is what my car likes.
The Best of Mercedes & AMG
Azn more or less made my point for me before I could get there

In Calif, all gas is the same. Let me repeat: all gas comes from the same flippin' refinery product. If you (general you, not you personally Azn) think there is any sort of difference from one brand to another (dirty gas aside) then YOU (general you) are drinking the coolade.
Don't believe me? Then do the research, find out for yourself.
Valero, ConocoPhillips, ExxonMobil, Shell, Chevron and BP all tweak their crude in the South Bay.
No telling exactly what goes into its processing. It can be said that their additive packaging often differs significantly – particularly when refilling the underground tanks among discounting retailers.
To RLE’s valid points, our SCAQMD and ARB have long mandated year ‘round oxygenated fuels to help improve air quality. They have, along with stringent biennial tailpipe CO, HC and oxides of nitrogen inspections, dramatically reduced the smog in our region during my four decades here. Downside is substantially increased consumption.
Almost certain mine runs better when driving to and about Mercer Island. :)
reference

Ignorance is bliss!!





