Originally posted by VX_PA
Email them back and ask if they will cover the cost to replace your engine due to contaminates mixing with thier product. If they will pay for any repairs and labor involved, only then would I use their recommended change intervals. Good luck getting them to sign that in writing. Let us know what they tell you.
http://www.amsoil.com/warranty.htm

Written on their site is 35,000 miles for light truck and car applications. Filter needs to be changed every 6 months, and oil topped off at that time.

http://www.amsoil.com/products/tso.html

http://www.amsoil.com/lit/g1490.pdf