Looking for Amsoil in Chicago, IL, and around the United States, thank you for viewing my website! Prior to using Amsoil, I was convinced the only way to protect my car was with changing oil every 3 months or 3,000 miles! I'd actually take my car in religiously every 3 months, even if I had only 300 miles!!! Yes, I was very skeptical when I found Amsoil! After testing in my own vehicles & equipment, from my 1979 Cadillac Seville to my 2006 GMC Savanna with 6.6L Duramax Diesel, I've now been extremely happy extending drain intervals using Amsoil products for every component available like Coolant/Antifreeze to Differential Fluids:-) I've used with confidence for over 13 years and excitedly distributed for over 12 years.
See on this page how many other popular brands compare to Amsoil in the Performance Tests Section. I've also performed many of my own tests and am happy to share the results.
Sincerely, Evan Porebski