ScottG wrote:
Funny you should say that about adding something...
My neighbor always uses their gas and has had intermittent engine roughness and stalling problems for a couple of years. Mechanic finally figured out it was water in his gas and "claimed" that Cosco has a problem with this. We too, use Cosco premium in our Challenger SRT which sometimes idles rough for no apparent reason.
.....
So we're done with Cosco gas - at least form the one in Woodenville Wa.
I can tell you with certainty that you have bought gas at your local CostCo that came from the same refinery as gas you bought from Chevron.
Both contract out to one of the same four local refineries.
