Amsoil manufactures the best in quality synthetic oils, ATF, gear lubes, greases, air filters & oil filters. Amsoil products are cost effective and economical and provide the ultimate protection available for your vehicles or fleet equipment while saving you time and money. Amsoil has been the leader in quality synthetic lubricants for 40 years and continues to provide cutting edge products for the 21st century. AMSOIL- First in Synthetic Oil. Best oil for your vehicle. Runs cleaner and cooler. Less oil changes for your vehicle.