I've been looking at cars like the Civic, Matrix, Mazda3, etc. A wagon would be best for me as I do a lot of car camping and extra space is very nice. However the best mileage I've found for a compact wagon is about 26/32. Then yesterday I came across the TDI. Yeah it's more money (though there is a $1300 tax credit), but it gets 30/40 listed and people seem to be getting more like 35/45 in real life. It has a 14 gal fuel tank so that is one incredible range and great for trips. But I keep worrying about VW reliability. By chance are many of the common VW problems with their gas engines, and consequently something I wouldn't have to worry about with a TDI?