Amsoil XL 10W-40 Synthetic Motor Oil
Enhanced Engine Protection for Extended Engine Life
AMSOIL XL synthetic motor oil is the choice for those who want to do something extra for their vehicle. Its advanced formula delivers additional cleaning power, superior wear control, outstanding high and low temperature protection, and exceptional fuel economy. XL is engineered for advanced automotive technology, including turbos and direct fuel injection. It is packed with extra engine protection, allowing you to go up to 12,000 miles or one year, whichever comes first between oil changes.
Prevents Oil Degradation
XL synthetic motor oil maintains fluidity (viscosity) under the most severe conditions. Some oils break down and increase in viscosity significantly after prolonged operation at high temperatures. These changes can cause excessive oil consumption, engine sludge, rapid wear, and difficult cold starts. The GM Oxidation and Sludge Test (GMOD) includes a 5.7L V8 engine running at 293ºF (100º hotter than normal) for 100 hours. These severe operating conditions test the oil's ability to control viscosity increase, sludge, and oil consumption levels. Testing shows AMSOIL XL synthetic motor oil provides over 64% more protection against oil degradation compared to GM dexos1® Gen 2 specification requirements, ensuring protection under severe temperatures.
Protects Pistons from Low-Speed Pre-Ignition
XL synthetic motor oil features unique chemistry proven to protect your engine against damage from low-speed pre-ignition (LSPI)*. LSPI is spontaneous ignition of the fuel/air mixture before spark plug ignition. Most new engines have gasoline direct injection (GDI) systems, often combined with a turbocharger. These technologies increase the likelihood of LSPI events, which can damage pistons and connecting rods. Properly formulated motor oil is critical to protect your engine against LSPI.
Original equipment manufacturers (OEMs) like GM have addressed this issue by designing tests to determine an engine oil's LSPI prevention capability. XL synthetic motor oil achieved 100% protection against LSPI2—with no occurrences recorded throughout five consecutive test runs.
*Low-speed pre-ignition
Keeps Engine Clean
