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Brucelee · 03-17-2011, 03:07 PM

Yes, they are. I personally have had issues with Costco gas and as I suggested, stick with toptier gas. The additives do seem to make a difference in keeping your fuel system cleaner.

03-17-2011, 03:07 PM	#6
Brucelee Registered User Join Date: Jun 2004 Location: Des Moines, IA Posts: 8,083	Yes, they are. I personally have had issues with Costco gas and as I suggested, stick with toptier gas. The additives do seem to make a difference in keeping your fuel system cleaner. __________________ Rich Belloff