I have a 2003 Grand Cherokee with 83,000 miles on it. It's stock and gets about 16 mpg city and 20 mpg highway. I'm looking for upgrades to increase the mpg's. Maybe a header, exhaust, remove the cat, cold air intake, performance module, chip or whatever. Help please!
Probably the best thing you can do to increase milage is to fill your tires to at least 38 lbs or the max listed on the tire. That and take it easy on thge pedal on the right. You're actually getting pretty good milage.
stop driving it. you'll get excellent fuel economy.
but seriously, if you already maintain it properly, id say changing your driving style can really affect your fuel economy. eg. smooth braking and acceleration, coasting before you get on the brake.. stuff like that
The best thing is to coast down hills and try to go easy on the brakes. Try to time it so you can coast to a stop light and lightly use the brakes.Keep the rpm's at 2k. As far as air pressure in the tires, I keep it at 38psi. I go half way between the max pressure on the tire and what the sticker on the door says.
Plan your driving better so you can coast more. Basically, try to drive like you have no brakes whenever possible (conserve momentum). Who cares if you only do 15 - 20 mph stoplight to stoplight in the city. If you know you're going to have to stop again very soon, picking up more speed than you need to coast to the next stop is just wasteful.
That is really good compared to my 12 around town and 21 on the highway. it sounds like you already drive pretty light footed I would say maybe clean your throttle body that always ups mine about a mile and the can lasts a while.