Better fuel mileage

[UH60HAWKSI]

Can someone help me with tips on how to improve my gas mileage on my fj80 I've herd suggestions like getting a kn air filter, changing the fluid in my gear boxes and chipping or reprogramming the trucks computer. Thanks Eric

 

[grantw]

Do you have any modifications?

If not tyres are generally the biggest impact. I.e size and correct inflation.