HFWR
Give me a museum and I'll fill it. (Picasso) Give me a forum ...
> Costco gas is always cheaper by $0.10 to $0.20
It depends. Back in the bay area Costco was always cheaper and had the long lines to show for it.
Here in Ohio, Costco isn't always cheaper. But the lines aren't long either ;-)
I use GasBuddy to track prices and around here they tend to spike (creep downward, then one day they go 25¢). When I see the spike, I usually go by Costco because they don't adjust their prices during the day and I have a chance to get the lower price before it goes up.
One the other hand, I now have a diesel car and our local Costco is gasoline only. BUT on our recent trip our west I saw a Costco in Bakersfield that was offering diesel with a sign saying "now offering diesel" implying it's a new thing. So maybe there is hope for it here.
My local Costco is usually two or three cents cheaper, plus the 3% "rebate" I get for using the Costco AMEX card.