[ciderbarrel]

Originally Posted by echo-francis

-Whiper Deflector (Tested) +1.5% MPG (US)
-Wheel Covers (Pizza Pan) (Tested) +2.15% MPG (US)

What are the raw number increases? Since MPG is not linear (it is a curve) these numbers mean nothing without the proper context.

Gaining 2.15% MPG at 50 MPG means you moved up to 51.075, a savings of 0.042 gallons (5.376 ounces) over 100 miles.

Gaining 2.15% at 10 MPG means you moved up to 10.215 MPG, a savings of
0.21 gallons (26.88 ounces) over 100 miles.