High performance formula for both gasoline and diesel engines (although for most gas engines, AMSOIL HP 10w40 is recommended). Ideal for racing and high performance applications that call for a 20w50 grade oil. Features new high-stress formulations with beefier anti-wear and detergent dispersant packages. Outperforms leading synthetic oils.

Drain intervals of up to one year are possible. For drain interval recommendations for specific vehicle types see the Oil drain interval chart.

Key Benefits to You:

Excellent engine protection
Extended oil drain intervals
Increased fuel efficiency
Improved power and performance
Less oil consumption
Reduce crankcase temperatures

Compatible Applications

Gasoline and/or diesel engines
High performance and racing vehicles
Light to severe duty trucks specifying a 20w50 grade oil
Construction, farm & marine equipment allowing for 20w50 grade
Motorhomes
Transmissions requiring 20w50 motor oil

Meets and/or Exceeds These Performance Specs:

API SL, SJ, SH, CH-4, CF-2, CF
ACEA A2, A3, B2, B3, E2, E3
Chrysler MS 8809A
Cummins CES 20071, 20072, 20076
Ford ESR M2C 179A
Mercedes-Benz 226.1, 227.1, 228.1, 228.3
Mack EO-L, EO-M, EO-M+
Volvo VDS, VDS-2
Volkswagon 501.01, 505.00
Allison C-3, C-4
Caterpillar TO-2, TO-3
JASO-MA (Motorcycle)

Recommendations for Use:

Unless you're going to use the HP 20w50 in a motorcycle or ATV engine, an engine flush is recommended for any vehicle that has used petroleum oil for the past 15 to 20,000 miles or more. This will help clean out any sludge and deposits that may be in the engine, giving you a fresh start for your new premium synthetic oil.

Any filter can be used with AMSOIL 20w50 synthetic oil, but oil filters not designed for extended change intervals should be changed every 3 to 4 months or every 5,000 miles (whichever comes first). The oil will still be good for the full 25,000 miles.

At each filter change you'll need to top off the system with oil. So, consider not only the cost of the filter, but also the cost of the oil you'll have to replace which is lost at each filter change.

To achieve optimum protection of your engine and easier maintenance, use a high efficiency full flow oil filter or bypass oil filtration system along with your AMSOIL 20w50 synthetic oil. These filters remove far more contaminants and last far longer than conventional oil filters.