I get 11-13 towing @70-75. The main factor is wind velocity and direction.My trailer is an 18' V-nose, and the total deadweight including race car is 4500 or so. This is 1-2 less than I got with my Tuareg diesel, which should be pretty close to the 35d. My X5 35i tows better than the VW did overall, though, mainly due to WB/ suspension differences. I like diesels, but the 35i is fine for towing and I feel no need for a diesel.
Last edited by dcharnet; 04-21-2013 at 05:56 AM.