Gas mileage

We have a 2005 GMC Envoy XL with the straight 6 cylinder engine. When not towing, we get 16-18 mpg. When towing the 177, we get 11 on moderately flat ground and 8-10 in hilly/mountainous areas. And that's strictly when we're actually towing.

From my experience, speed when towing is what destroys your mileage. Going 65 mph drops our mileage by around 20%. Going 55 instead of 60 improves our mileage by about 10%; I've never tried 50 mph. But my wife isn't very patient, so we compromise and travel at 60 mph on the highway.

The best mileage I've personally heard anyone getting was a guy pulling a Pod with a GMC 3500 diesel. He got 14 on the highway when towing, but his mileage remained practically the same even when he wasn't towing, so that doesn't seem like a good solution either.

If you're getting 13 or better strictly when towing, be very happy. And remember, you didn't buy your Pod to improve your fuel efficiency; it improves your happiness factor.

2008 Silverado 1500, 5.3L 4X4. 16.5 MPG normally. 12 MPG when towing between 60-65, on average. At 70 it drops to 10 MPG. With a strong crosswind in the mountains it drops to 9 MPG. Sounds like you're doing OK to me.

We have 2015 Silverado 1500 4x4 with 5.3 gasser pulling a 179 with two bikes on the rear of the pickup and approx. 150 lbs of stough in the pickup bed.  We recently drove to Yellowstone, put 4000 miles on the truck with an average of 13.3 miles a gallon(expressway towing 65 - 70 mph), this includes side trips.  Our milage was better going east.

If you are really getting 13-14 when towing, you are doing 30% better than anyone else, Be Happy.

Originally posted by Tanager I'm wondering if anyone out there tows a 179 with a full size pickup with a V-8 (and 4WD). If so, what do you average for gas mileage? I tow with a 2006 Tacoma V-6 and am only getting 13 to 14 at 60 mph. Could I get better mileage with a larger truck?