Here's another great thing about Costco gas.
Here in Indiana, some stations had dipped below $3.00/GL. The average was around $3.15 and Costco got down to $3.08. After the $7 rise in crude on Friday, nearly every gas station in town went up to $3.45. With Costco's promise not to mark up anything they sell more than 15%, they went up to $3.18. This is not an isolated instance. They always give a greater cushion on the way back up.
So while they may not be the absolute cheapest gas in the market, they ALWAYS provide an important cushion when prices are fluctuating wildly.
BTW, if you want a crystal ball on where gas prices are heading In the short term, turn on CNBC and watch for the RBoB Gas price on the top ticker. The retail price is normally $.65-.75 above this price which is $2.75 today. That spread had been squeezed down to about 30 cents so it was easy to see this jump coming and at least get alll the vehicles filled up. You beat a few of these big price increases several times per year with three or four vehicles and it really adds up.
104 in Indy today. Yikes! We had no 100 degree days in 20 years and now 7 in the last year.