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I also put down the SG tank average speed, but it only tells me "something" about my aero modifications/consumption directions.
lets say that I do new front bumber for my car and I want to know if it is any better than the last one. I could do some ABA test but I burn fuel by doing so, not good for in my opinion. At the moment I see that it is best way for me to compare results is by tank consumption. Well tank consumption figures are ok but I normally dont drive my usual highway driving the same way every trip. There are many things that effect to my speed.
1. Am I in a hurry. (not often) speed ca 80mph
2. Is there a good big car to follow at speed what I am comfortable of driving. Speeds usually between 60-75mph
3. Is there any cars to follow. speeds 60-70mph
Well depending on these situations how I have driven the trip my avg speed for my normal highway trip is usually between 47-57 mph. I would like to know how my highway speed affects to my tank consumption. I cant trust my SG readings because I have calibrated it so that it tells accurate reading when I am using full push and glide technique for the whole tank. When I am driving speeds below 55 I use different techigues and so my SG accuracy starts to go bad.
Lets say I drive full P&G at avg speed of 50 mph SG shows me a reading ca 84 mpg.
60 mph is ca 71mpg
But when Im driving in the other driving method speed of 75 mph my consumption figures may be something like 39 mpg so my consumption have doubled!!! I know the real figures should be something like 52 mpg...
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