Originally Posted By: TedSexington
Costco just started advertising their new additive in there gas having x5 the additives then EPA requires. How ever it aint rated Top Tier. Does anybody know how good is the new updated Costco gas?
Costco Gasoline with Kirkland Signature Clean Power (man, that's a long name) is currently only available in WA, OR, UT, ID, MT and AK. Maybe we should hear from someone in those states as to how much better the new formula is.