Originally Posted by
bigblue61
Theres too many factors, my engine is in near perfect condition just changed the plugs out and i get about 11.5 and much less in the winter. But I idle alot and have a lot of short trips and sometimes my truck dosnt warm all the way up. If you do a lot of highway driving or dont drive as hard or dont idle as much your v10 numbers could be better. Theres just no way to compare numbers that arent done close to the same way.
This is exactly right.
I know that I drive exactly the same as a good friend of mine that's nearby, our trucks are equipped almost exactly the same, we both feel the same about warmups,etc,etc..and his 5.4L truck is the same towing a similar load, and only 1-2 mpg better highway driving.
JL