The companies that make the tuners state that the gain in HP from doing a delete is from 3-5%, hardly enough to matter. The gains in fuel economy that they advertise would require me to drive 50,000 miles to recoup the cost of the tuner.
All the truck manufacturers want to provide the best fuel economy they can to be competitive. It is impossible for me to believe that a guy in a garage can provide a better tuning specification for fuel economy than the hundreds of engineers working at Ford, GM, and Ram. It fails the sniff test.
The way to save money on fuel is to drive less and drive slower. Spending the extra $8,000 for a diesel pickup and paying the higher per gallon fuel costs and higher maintenance costs is not going to result in any real dollar savings for the average driver.
