gyre wrote:I haven't mentioned most of those things, including alignment.
What difference would a filter make?
I did mention bellypanning, mostly overlooked.
Plenty of things to raise mileage, but most people don't want to spend money.
Not everyone is operating at the same level of sophistication.
What's your damage?
Don't think air drag or high compression can affect mileage?
I ALWAYS bring an extra air filter, and put it in when I get to Ferley after I leave the playa. The first year I did this, I emptied out nearly half a cup of playa dust on the ground. Clean air filter = more air in the air/gas mix = better fuel mileage/engine efficiency.
I've got NO damage to the vehicle, a high engine and pan, and a LEER camper shell on it.
I also make sure I get the little felt anticorrosion rings and put them on the battery terminals to defeat the playa dust if it should get on them. No corrosive activity, in other words.
I usually get 15-16 mpg with a 6-cyl., and on the long drives I've had it to 17-18 mpg.
I won't spend any more money to SAVE money than the money it costs to do it. Sounds like air pressure in the tires is a freebie.