AMSOIL P.i. Performance Improver increases fuel economy, reduces emissions and restores vehicle power and performance by dissolving and removing combustion chamber, intake valve and fuel injector deposits. In fact, field testing shows AMSOIL P.i. provides an average fuel economy improvement of 2.3 percent and up to 5.7 percent. Because of this substantiation, as well as the company’s confidence in the performance benefits of P.i., AMSOIL is offering a money-back guarantee on the product’s fuel economy benefits. If a customer does not see 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 begins March 1 and is good through May 31. It is open to everyone, including Dealers, Preferred Customers, retail customers, catalog customers, commercial and retail accounts.