I'll try to be "nice", but may I suggest you re-think the possibilities of diesel and potentially a duly. Once you tow with a diesel and especially a duly, you'll understand. (especially if you are think 5er!) You've heard the advertisement, "Nothing runs like a Deere" (John Deere tractors and mowers)... well, if you've never tried one, you'll never understand. Same is true with diesel / duly. (and FYI, I use mine for a daily driver all the time, it's 25 miles 1 way to my office.)