The XL Series:
The AMSOIL Extended Life Synthetic Motor Oils (XL Series) are the best choice for motorists who wish to change their oil more often than one year or 25,000 miles. Rated for 7,500 miles or six months, they are ideal for vehicles with electronic oil life monitoring systems. This is also the oil of choice for quick-lube applications.
XL 5W-20 Synthetic Motor Oil (XLM)
XL 5W-30 Synthetic Motor Oil (XLF)
XL 10W-30 Synthetic Motor Oil (XLT)
XL 10W-40 Synthetic Motor OIl (XLO)