Originally Posted by PhlyingRPh

Sir, I yield to your most excellent mathematical prowess. ^ However, over the course of this now 25+ year sentence in the US, if I average the ratio of UK to US petrol prices, it is almost exactly a 3X difference. In fact, I'm looking at my credit card bill from Jan, and note that I filled up my car at my local Costco for $54 (pre-post-Mubarak days), and four days later filled up a similar car at the Sainsbury's in Wimbledon for $172.