This is my first diesel truck and it rides great!! But my mileage leaves a bit to be desired.
13.5 in town
14 - ? Highway. Took my first trip today on the highway and at the end I pushed her to 80mph and the MPG started changing, but then I pulled off so not sure what the best is.
Does anyone use or know of ways to get better mileage, such as Chips. I already went to a thinner, taller tire then what was on it.

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Any good advice or review on a product would be very helpful.
Thanks.