Hypermile 1992 4Runner

[waddie]

I just bought a 1992 4Runner in EXCELLENT shape. It's a 5 speed with a V6. I'm excited because it's everything I want in a car plus back in those days the Toyota v6 was much smaller than the one they build today. My question is how to get TOP mileage. I just bought it, replaced the plugs, rotor, and distributor and changed the motor to synthetic. This weekend I will change the rest of the power train to synthetic. Next week I want to buy tires but I want to get the right size and tread conducive to high mileage. Any suggestions? Also besides wires, air filter and fuel filter what else can I do for TOP MPG? The wheel bearings aren't loose but would synthetic grease make any difference? Should I spend the time and money to fab up an under body pan for wind? Remember it's a 1992, I'll consider ANY modification.