These are a couple of tips my teacher from school enlightened me on. I go to UTI an automotive trade school, and believe me, these teachers know their spit. If you want to increase your gas mileage, (this sounds crazy, but i believe him) get a spray bottle filled with water and take of your intake tube. Then while the engine is running, spray water into your throttle body SLOWLY about three or four times. Have someone inside the car while you are doing this, cause they are going to have to give it gas a couple of times to keep the engine running. What this does, is it helps to get the carbon build up off the top of the pistons. The carbon build up on the pistons is what can cause detonation. Keeping your pistons clean will help to get a better combustion in turn meaning better gas mileage.

Theres also another tip that my teacher told me. When you do an oil change, add a quart of ATF fluid to your car, the ATF has a LOT of conditioners that will help to keep your seals looking new. Just Make sure that if you do this, that you change your oil EVERY 3,000 miles. If you keep the ATF in for too long it will fuck up your bearings. So if your going to do it, do it right.

My last tip is a simple one that many people seem to overlook. How often do you change your oil? I'd recommend you do it every 3000 miles. Why, because I said no. hahaha, j/k The reason why that is soooo important isn't because it's just good for your car, but because the oil filters are only made to go 3000 miles. They make synthetic oils and what not, but do they make synthetic filters? I've never seen one that specifically said, "MADE TO LAST 7000 MILES" So even though you use synthetic, i'd still change it every 3000, it'll help your engine last longer and depending on what type of oil u use, it'll make your car run that much better. Take an old bolt and rub it on your driveway as fast as you can, thats what happens when you run your car with bad oil. Oil breaks down and thats when trouble occurs