Im wondering if there is something I don't know. My car use to get decent gas mileage but now I feel that my car is a gas hog! I own an 99 teg. Do you guys have any tips on inproveing the gas miles? Im' going to use some more fuel injection cleaner and go to lighter motor oil like 5-30. Im all ears to some trips of the trade....

 

new spark plugs, pcv valve, fuel filter, K&N air filter (or equivalent), performance header/cat/exhasut, proper tire pressure, fresh wax . . . those are the things i can think of right now

 

Have you worked out you gas milage and what are you getting? I worked mine out to be 30mpg for my LS. I have a CAI and it helped.

 

Wax isn't going to effect mpg :rofl:.

Just make sure you're doing routine maintenance.

 

Wax actually does make a difference to mpg while at highway speeds. Smoother surface = less aerodynamic drag = less energy to propel vechicle = better mpg.

 

Bhwhahaha, your coefficient of drag is going to remain the same at the speeds your vehicle can travel regardless of the smoothness of your paint surface :rofl:.

Things that will change your coefficient of drag are; bumpers, lips and wings. Pretty much any actual modification to a body panel.

 

everything listed here so far wont make any difference if any. the best thing and the cheapest thing you can do is change your driving habits. slow starts, shift earlier and drive at slower speeds on the freeway (use cruise control). oh and make sure your tires are inflated to the correct pressure (not over inflate but correct pressure)

 

The guy on Top Gear did a MPG test in a car that showed manually maintaining speed was better than the cruise. FWIT.

Driving slower makes a huge difference in MPG. Gentle is the key.

 

Form drag (bumpers, lips, wings) and Surface friction are different things.. For example Airplanes are not waxed to look "tight" they are waxed to reduce surface friction.

Here is an example based on the flight of a baseball:
The drag force Fd = CdpAv2
Where

* Fd is the drag force
* Cd is the drag coefficient
* p is the density of the air
* A is the surface area of the object or in our case pi r2
* v is the velocity of the object

What does this equation tell us? It tells us many useful facts:

* The faster the ball is traveling the larger the drag force will be
* The drag force may change significantly between different stadiums due to change in p, density of the air. This equation might explain why more home runs are hit inside the Colorado Rockies' stadium.

http://library.thinkquest.org/11902/physics/air.html

 

One has nothing to do with the other. the "formula" you quote from the webpage doesn't apply to static (none tumbling objects).

and your statment of using wax to reduce surface friction is still inapplicable. drag on a car is Cd x surface area. you are saying you are changing the Cd by applying wax, no you are changing the surface tension at best, which might net a small tiny fraction of reduction in Cd.