How much mileage increase can I reasonably expect from RXP Generation II?
As noted above, most but not all engines do see an increase in fuel mileage and results vary significantly depending on a number of factors. One of the major factors affecting response is the level of carbon build-up pre-exisiting in the engine. Older engines with more mileage see greater mileage increases due to the decarbonization (removal of carbon build-up) benefits of RXP Generation II . It is reasonable to expect many but not all such engines to respond with a 10% to 15% improvement in fuel efficiency. The Florida DOT study using RXP showed increases from 4% up to 30% in vehicles whose mileage exceeded 80,000. For older vehicles with mileage under 50,000 and thus smaller amounts of engine carbon build-up our long term experience has shown mileage increases from 5% to 10% with use of RXP. In a brand new engine, with no carbon build up, the expected mileage increase is more likely to be 2% to 5% based on the increased thermal value of the fuel. For maximum fuel efficiency, New Ques
