your mpg?
#5
Unfortunately computer controlled vehicles were not primarily computerized for mileage .If mileage benefitted, that was a bonus. The computer or a good part of it was to control emissions and increase reliability. There are many older vehicles that get better mileage than some newer ones. Some of the mileage advancements are due to engine size and overall weight reduction. The big drive is on to provide better power with a smaller engine by way of turbocharging. The older vehicles that obtained better MPG most likely cannot meet the strict pollution requirements of today. IMHO , that's the way I see it from where I am.
#10
Would you be kind enough to share some of your maintenance policies with those of us that seek to get the results you are getting ? Knowing the little we know even the newer vehicles suffer problems and running the schedule you must run doesn't allow very much time for unscheduled maintenance. Hard to believe you got a 5.4 to get past 300,000 mi. without engine replacement. How many hours per day do you run these vehicles? Is it a 7 day operation?