Amsoil Inc. is leader in automotive synthetic since 1972 with the first 100% API rated 10W-40 Synthetic Engine lubricant. Recently the updated XL and new OE engine lubricants have been initiated and launched. These products and other related products are options for vehicle owners of all types and sizes that will reduce operation and maintenance expenses and can be ordered when establishing an account. A Preferred Customer account is a smart way to begin using the products without auto-ship or minimums.