I'm pulling a '04 30' Classic Slide out with a GMC passenger van, 6.0 liter 4.10 rear axle. MPG solo 11-13mpg city. Towing about 10-12 mpg. depending upon terrain. It's a great tow combo. You shouldn't be much worse than me. Jack Canavera STL. Mo. '04 Classic S.O. 30' WBCCI 5024