On a long steep downhill, my previous top coasting speed was
49.1 mph which the car hit and maintained for 1/4 to 1/2 a mile. The top speed during the last trip was only
45.6 mph, a 3.5 mph difference. There was a similar difference in my mpg average for the trips in either direction.
Code:
october november difference
downhill coasting 49.1mph 45.6mph - 3.5
east 125 miles 58.9mpg 54.2mpg - 4.7
west 125 miles 60.1mpg 56.5mpg - 3.6
What is the most likely cause of this? The only changes I made were (1) trimming the bumper cover and smoothing/covering the under part, (2) enlarging the vent, and (3) removing resistance from the brakes. However I'm still suspecting the brakes, maybe due to sticking front pistons. Two hours after getting home (I forgot right after), the temperature outside the front wheel covers was 4 degrees higher than in back. The setback is disappointing, and I'm wondering what to focus on next.
previous bumper cover
current bumper cover
