There is a long tretise on gasoline online somewhere. The writer was/is a pteroleum engineer.

His point is all major brands of gas clean up deposits, but they also leave deposits. So he switched gas brands every 2000 miles. But he claimed that running only one brand of gas was not a good idea.

I just buy whatever is convenient of the major brands.

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Terry Carraway

'95 Alpine M3 LTW
'00 Dakar M Roadster
'02 Topaz M3
Red/White SRF #4 (Chassis 561)