Been usin Mex. diesel fuel for years now. Usually cross at Otay,the fuel station, taco stand and tortilla stand are less than a mile across the border and the line back is much, much shorter. Check it out on Google Earth!! I strap a 50 gal. tank in the back of my truck and have had zero problems. Two months ago I paid $2.77/ Gal., price must of bumped up?? I also have a SOCO commercial fuel card which I can use up here but its only a .30 to .40/ cents/ Gal. savings and the prices aren't quite their yet.