Please help, just bought a 2012 Ram Big Horn and gas mileage is horrible. I am getting roughly 7.8mpg or 30L/100km. Had it scanned for any hidden error codes, in case it may need a tune up etc.

Asked by Stephen Mar 01, 2015 at 09:05 AM about the 2012 RAM 1500 Big Horn Crew Cab 4WD

Question type: Maintenance & Repair

Scan came back ok.  Mechanic said it runs great.  Should I bring it to dealer to
make sure all the settings are correct for tire size, gear ratio etc?

1 Answer
20

jacktt42 answered 9 years ago

on my 2004 Silverado z71 I was getting 17 miles to gallon on highway, I watched 4 wheel drive show one day and they recommended royal purple in rear axle and front as well. I did it and picked up approx. 7 miles more to the gallon. Its about 19$ a quart, my truck took 6 quarts. Its high in synthetics

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