Quote:
Originally Posted by Ladogaboy
For instance, if modification X is estimated to produce a 10% improvement in fuel economy, and X is performed on vehicles A (~ 20 mpg) and B (~ 30 mpg), would A see a 2 mpg improvement while B sees a 3 mpg improvement? Basically, do these modifications become more substantial as the vehicle's base mpg increase? tiy
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Your math is correct - a 10% improvement is 2 MPG for A and 3 MPG for B. Keep in mind, however, that if A and B are driven the same number of miles, A will save more gallons of gas.
Also, a mod that saves 10% on one vehicle may not save 10% on the next vehicle.