Hi Jo-anne, I have an R reg GC 4litre for towing. 3300kg max, 140kg noseweight, 190hp. Fuel consumption is not good at an average of 15 mpg, but mine runs on LPG. I tow a 23ft Hobby weighing 1900kgs and the Jeep rarely comes out of overdrive at anything above 45mph. I couldn't praise it highly enough as a towcar, but everyone's different. My view is the diesels are as rough as a badger's a**e and fuel economy isn't much better than the petrol. One piece of advice though, use only Jeep specified differential oil or be prepared to pay dearly. Best of luck.