Cooper Tires STT PRO truck camper MPG test

Attempted to establish a baseline for fuel economy/mpg at 65 mph, with the 35.4″-tall, 295/65R20 Cooper STT PRO tires under a heavy Hallmark flatbed truck camper outfit. There was too much wind for this to be a true baseline, but efficiency was still good for this not-aerodynamic configuration; just under 13 mpg. I probably will revisit this in the future. … Read More

Dodge Ram Cummins Flatbed Camper MPG

Backgrounder A recent Nevada Highway 95 trip from Northern Nevada to Southern Nevada, and back, a very familiar route, produced some interesting data. People often make contrary statements about shared fuel economy information, generally well intentioned but not always accurate, including: 1) My similar truck/camper does much better (or worse). 2) An aftermarket engine tune would produce superior results (doubtful … Read More

23 mpg Ram Cummins 2500

23.21 MPG from a 2017 Ram/Cummins. 65-mph highway baseline test, Sept. 5, 2017 222.7 miles, 9.593 gallons 65-mph freeway/highway test light/no wind A/C on Tires: F 60 R 40 cold Regular cab, long bed, 7,400-lb. GVW Newer diesel trucks are not as efficient (due to emissions systems) as previous generations? Maybe. Probably. Though it depends on the exact year, model, and … Read More

Tread Matters: Tire Selection and Fuel Economy

Tread Matters: Tire Selection and Fuel Economy Tires have been a popular subject in magazines for decades, and forums continually see new threads seeking information and expertise. This is partly because they are expensive. They can also provide dramatic style and performance improvements and are an easy upgrade. With so much talk, it is surprisingly difficult to get unbiased, detailed, … Read More

Big tires, odometer error, and mpg

Recently a friend emailed this miles-per-gallon question: I’m scratching my head here on fuel and mileage numbers. If I do the math for gallons of fuel consumed (fuel filter life % gauge) and odo I get about 16 mpg. But the Ram’s EVIC dash display says 11 MPG. With 4.30:1 gears and 37-inch tires, I know ALL the numbers are inaccurate. How … Read More

$4 Per Gallon, $75 Pump Shut Off, and Range

Last weekend we had the pleasure of attending the 2012 Overland Expo near Flagstaff, Arizona, and spent four nights camping in our new-to-us Four Wheel Camper. To maximize our time at the event and accommodate our work schedules we were forced to drive the full 730 miles to the Overland Expo in just one day. To reduce our time on the … Read More

Fuel Economy And Wind

Driving in the wind can be a drag, particularly if you’re driving a high-profile vehicle, hauling a camper, or pulling a trailer. We live in an area that often has wind, and unless it’s coming directly from the rear, wind is an impediment to good fuel economy. A perfect, direct tailwind is like the perfect anything, nice to dream about but … Read More