FL-RAM
Senior Member
- Joined
- Sep 10, 2020
- Posts
- 388
- Reaction score
- 434
- Location
- PENSACOLA, FL
- Ram Year
- 2022 Bighorn Night Edition
- Engine
- V8
Just curious how you figure your MPGs if you have bigger tires? These come with 31" tires, and I'm running 33" tires. Comparing the speedo with a gps unit, my actual speed is usually 1.5 - 3mph faster than the speedo display.
My simple mind tells me that if I put one gallon of gas in and drive for 20 miles on the odometer and it dies...the OBC will say I got 20mpg, but in reality I will have actually traveled something around 21-22miles. So I assume my MPG display will always be a couple MPGs low.
Just wodndering if there was a simple way of calculating it without getting too scientific or having the speedo recalibrated.
My simple mind tells me that if I put one gallon of gas in and drive for 20 miles on the odometer and it dies...the OBC will say I got 20mpg, but in reality I will have actually traveled something around 21-22miles. So I assume my MPG display will always be a couple MPGs low.
Just wodndering if there was a simple way of calculating it without getting too scientific or having the speedo recalibrated.