RV Fuel Issues & Prices - Post 'Em Here!
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Took a look at the Costco web site to see if they had any info:
Detergent additives
Since 1995, Federal regulations mandate that all gasoline contain an EPA-approved detergent additive. These additives are designed to minimize engine deposits that can affect vehicle performance and emissions. The various proprietary detergent additive formulations are the main difference between brands of gasoline. All Costco gasoline, both regular and premium unleaded, contains detergent additives.
I read this as they have the EPA minimums. If I have some time I'll look around and see if any testing labs have actually tested gasoline.
Link
Detergent additives
Since 1995, Federal regulations mandate that all gasoline contain an EPA-approved detergent additive. These additives are designed to minimize engine deposits that can affect vehicle performance and emissions. The various proprietary detergent additive formulations are the main difference between brands of gasoline. All Costco gasoline, both regular and premium unleaded, contains detergent additives.
I read this as they have the EPA minimums. If I have some time I'll look around and see if any testing labs have actually tested gasoline.
Link
