The Costco in Vacaville sells the cheap stuff for $3.79 per gallon (as of today, 30 April 2008). That’s about 9 cents cheaper than anyone else in Vacaville, or Concord.
So I just filled my tank for about $38. This is about 10 gallons, on which I will drive about 350 miles.
I love my Yaris. I am sooo glad I got this car! I’m loving the gas mileage.
PS – Neener neener