Forum Discussion
larry_barnhart
Mar 13, 2018Explorer
Cummins12V98 wrote:rbcamping wrote:
I'm going to put my 2 cents in here. On my Dodge, I put 19.5s on it and had a slight gain in fuel economy when driving down the highway and towing. I had a slight drop in economy around town, they are heavy, but have less rolling resistance. There are a lot of factors that go into economy and engine efficiency is a big part. Blanket statements will surely get you into trouble.....Just my experience.
Did you calculate your mileage based on actual miles clocked, not what the odo showed?
Many different methods to check miles per gallon but only one way is correct. I have been shocked with some of my friends telling how they check mpg. Good old gallons into the miles driven, the old fashion way as Cummins does.
chevman
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