CA Fuel Quality...Causing More Knock For Anyone?

HAHAFiST

HAHAFiST

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Any of you in CA noticing more timing corrections and possibly OAR changes even on pump gas tunes? I'm finding i have to add a little extra ethanol to my 91 and my E30 tunes to avoid these things. Did a fuel test a while back and while the results weren't amazing... they weren't that drastically poor. Before i go further down the rabbit hole I want to see if there's been a trend relating to our fuel quality.
 


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rallytaff said:
According to a survey, COSTCO fuel comes out as one of the best! I always fill up there!
Click to expand...
Costco is one of the fuel stations that has TopTier+ fuel now (as opposed to just Top Tier no plus).
Not to mention they are the cheapest alternative for 91 these days.
 


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