Actually, I have known people that have tried them and claim that it helped. However, the help was minimal. Even 20% or 12 miles to a gallon is only 2.4 miles. It could help a small amount, but I can't guarantee it will.
To be honest, I've been in the business for nearly 30 years. What I have found is this. If you are racing the car, add on components / performance parts are needed. However, for a daily driver, the vehicles do their best the way the engineers designed them.
Sunday, January 17th, 2010 AT 12:07 AM