Maybe the pump is calibrated badly. I'm sure the owner wouldn't object to you paying for 14.3 gallons when you've really only got 13.2!
Or maybe the 13.2 is supposed to be 'usable' fuel. Sometimes if you're heading uphill (or downhill, depending on the tank design) you can't use all the fuel, and they quote a 'safe' figure?
Or maybe they're referring to Imperial gallons instead of the wimpy little US gallons. (US gallon ~ 3.8 litres, rest of the world gallon ~ 4.5 litres)?
I agree with the point about Imperial vs US gallons. Most likely, BMW used imperial gallons in the specs
DiegoOctober 5, 2011 I've been using Benz by Blair for two years now for my late model Mercedes C-Class. Not only has BbyB performed all rlgaeur maintenance at prices much lower than the Mercedes dealers, they have saved me $100 s of dollars in repairing normal wear and tear items on my car like scratches and dings, keeping my car looking and feeling like it was just purchased. So if you don't want to make a claim to your insurance for these smaller items, go to Benz by Blair and they will save you money if it's possible.BbyB was also able to get a genuine part for half the dealer price. I couldn't believe it. I don't know if they can do this every time, but I do have comfort knowing they will try.