#1. Get yourself an accurate tire pressure
gauge.
Check the pressure when the tires are cold.
Set the pressure to max stated on sidewall of tire.
Check tire pressure every six weeks.

#2. Don't carry any extra weight.
Discard all unnecessary items.

Good Luck...
¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬

Regarding the "air ram" im not sure,but A good breathing engine is a more
efficient engine,I am going with the intake model #63 from K&N to improve
the intake it loses the airbox and direct cold outside airto the
air-filter,yes it employes all the original emisions stuff, and I just found
out there is now headers for the 4.0. I dont know that I want to get that
carried away but I will install a better flowing exahust..
There are a lot of don't touch your toyota nuts out there, I expect flaming.
So enjoy

Tdubya sez:

The only way that after market devices are going to improve your mileage
is reducing the load on your engine because your wallet is a bit lighter.

If you want better mileage, modify your driving habits, pressure up your
tires (pay heed to the ratings on the sidewall) and use your cruise
control where appropriate.

All K&N filters do is let more silicates (sand & dirt) pass through into
your engine and promote premature wear.

Good wrenchin' to ya,
VLJ
--

There is probably nothing you can buy that will more than pay for
itself in fuel savings.  A guy on tundrasolutions.com has put
together a ram air kit from some plumbing fittings and offers them
for $99.  If it helps, it's only a help at high speeds.  Toyota's
engineers did very well in designing the truck, and not much will
make a 5000# truck burn less gas.

Just the basics---
-drive slower
-start from a stop more gently
-don't carry around a lot of heavy junk nor a ladder rack if not needed
-when you next need tires, don't get big, lumpy-tread tires
-try different brands of 87 octane gasoline.  See which gives you
the lowest fuel cost per mile
-air up your tires
-do engine maintenance on schedule

Somebody explain how changing the intake makes any difference except
at wide open throttle?  The throttle assembly, throttle body and
throttle plate, is doing its job by throttling the air flow to limit
the air going to the engine to match the fuel needed for the power
you want.  If the throttle is almost always partly closed, what good
 are intake mods?

Ken