what do you do to get the most mpg in your truck

A strong magnet on the fuel line to align the molecules into long strings, positive to negative, so the fuel burns more efficiently.

Scott

Originally Posted by wannabemechanic

I've never heard of this, is there somewhere you recommend reading more about it?

Here you go, they help explain all the quackery;
K&J Magnetics - Fuel Magnets

Describe to me how a fixed thing like rotations per minute changes?
Should not happen with a lock up torque converter

Cause tucking in behind the semi will "pull" your vehicle along. If you get close enough you could theoretically take your hand off the wheel and foot off the throttle. Do not try this at home. When you can lessen your wind drag by 40% safely then something's working. http://www.treehugger.com/cars/draft...s-it-work.html

Originally Posted by Mechanic688

Here you go, they help explain all the quackery;
K&J Magnetics - Fuel Magnets

Reading that, they don't sound too sure of it themselves, but of course if someone wants to buy something you can make there is no reason not to, haha. To my understanding though, the nature of hydrocarbons such as gasoline renders them essentially "non-polar," which is why they separate from water (which is polar, meaning that each molecule has basically a positive and negative end). To me it doesn't make any sense... Is there anyone that can direct me otherwise?

Originally Posted by wannabemechanic

Reading that, they don't sound too sure of it themselves, but of course if someone wants to buy something you can make there is no reason not to, haha. To my understanding though, the nature of hydrocarbons such as gasoline renders them essentially "non-polar," which is why they separate from water (which is polar, meaning that each molecule has basically a positive and negative end). To me it doesn't make any sense... Is there anyone that can direct me otherwise?

If you want to try it yourself the take a pair of hard drive magnets and duct tape them to the metal fuel line going to the engine. Put one on top and one on the bottom. That way your not out any money on the experiment. Might have to use a hose clamp instead of duct tape.