Originally Posted by GRU
I have driven my car on the same road. At the same speed. At the same time ( reseting the trip mpg every 2 minutes ) and got different numbers every time because its almost impossible to have the same exact conditions even if they are only 2 minutes apart
So the solution is to do nothing?
sure there are variables but the idea is to get a BASE idea of what the car does.
1. warm it up before first drive.
2. do it after noon (temp stay consistant for a couple of hours)
3. Up and down negates wind
4. don't do it on a windy day.
5. do it on a day over 70 degrees.