The XL-7500 is Amsoil's bottom shelf product. Since it's inception back in 99 the XL-7500 has always been the lower tier oil designed specifically to be competitive with the $4.00 off the shelf synthtetics, comply with API specs, and have something for the warranty concsious consumer who was not comfortable with darin intervals beyond the factory recommendation.

The main line of Amsoil's products are still Group IV PAOS and still the best value in the business.

Don
www.syntheticoils.net/dstevens