AMSOIL is now offering a money-back guarantee on its top selling gasoline additive AMSOIL P.i. Performance Improver, if the product fails to improve a vehicle’s mileage. According to the company, field tests show that AMSOIL P.i. provides an average fuel economy improvement of 2.3 percent and up to 5.7 percent. If a customer does not see a measurable fuel economy improvement in his or her vehicle after first-time use of P.i., AMSOIL will refund the purchase price of the product.

The P.i. money-back guarantee offer is good through Dec. 31, 2008, and is open to everyone who drives a gasoline-powered vehicle. Because the most dramatic fuel economy improvement is achieved after first-time use of P.i. in a vehicle with accumulated deposits, the P.i. money-back guarantee is limited to vehicles with a minimum of 25,000 miles that have not previously been treated with P.i. and have not undergone any fuel system or fuel injector cleaning procedure. P.i. must be used with a full tank of gas, and the P.i.-treated gas must be run until the tank is near-empty before filling up again.

Customers are eligible for the refund if they do not see a fuel economy improvement following use of the subsequent tank of gas after P.i. treatment. If a customer has not received a fuel economy benefit and wishes to take advantage of the money-back guarantee, he or she may simply download and print the refund form from the AMSOIL Corporate website at www.amsoil.com. The form contains complete qualification details.