AMSOIL 0W-40 Signature Series Synthetic OilThis 0W-40 full-synthetic oil for high-output Dodge SRT V-8, V-10 and Nissan GT-R engines covers the Chrysler MS-10725, MS-12633, MS-10850 and API SN specifications. This motor oil is ideal for Dodge Hemi 6.1, 6.4, 6.2, 8.3 and 8.4 litre engines, along with Nissan GT-R 3.8 litre twin-turbo engines. We can sell this 100% synthetic 0W-40 synthetic engine oil at wholesale prices in Canada and the USA. Please contact us for a price list using the form on this page or call us at 1-800-748-5781.

AMSOIL Synthetic 0W-40 package sizes include:
Single US Quart Bottle
Case of 12 US Quarts

Signature Series stacks up against any motor oil out there. I have no hesitation in calling it the world’s best.  – AMSOIL Chief Operating Officer Alan Amatuzio on the latest Signature Series reformulation. October, 2017

Suitable Applications For AMSOIL 0W-40 Signature Series Synthetic Oil

This 100% synthetic oil is suitable for turbo-charged and naturally-aspirated engines requiring the following specifications:

  • Chrysler MS-10725, MS-12633 and MS-10850
  • Nissan GT-R
  • API SN, SM

Applicable high-output Dodge/Chrysler/Jeep Hemi SRT V-8 (including supercharged models) and V-10 engines include:

Dodge Charger

  • 6.1L V-8 engine 2006-2010
  • 6.4L V-8 engine 2012-newer
  • 6.2L V-8 engine 2015-newer

Dodge Challenger

  • 6.1L V-8 engine 2008-2010
  • 6.4L V-8 engine 2011-newer
  • 6.2L V-8 engine 2015-newer

Chrysler 300/300C SRT8

  • 6.1L V-8 engine 2005-2010
  • 6.4L V-8 engine 2012-2014

Dodge Ram 2500/3500/4500/5500 Pickup Truck

  • 6.4L V-8 gas engine 2014-newer

Dodge Ram 1500 SRT-10

  • 8.3L V-10 engine 2004-2006

Jeep Grand Cherokee SRT

  • 6.1L V-8 engine 2006-2010
  • 6.4L V-8 engine 2012-newer

Dodge Magnum SRT8

  • 6.1L V-8 engine 2006-2008

Dodge Viper

  • 8.3L V-10 engine 2002-2007
  • 8.4L V-10 engine 2008-newer

Applicable high-output Nissan engines include:

Nissan GT-R/ GT-R Nismo Edition

  • 3.8L turbo-charged V-6 engine (VR38DETT) 2009-newer

AMSOIL 0W-40 Signature Series Synthetic Oil is an elite replacement for the following:

  • Pennzoil Ultra 0W-40 Synthetic Motor Oil
  • Mobil 1 0W-40 Synthetic Motor Oil
  • Red Line High Performance Synthetic 0W-40 Motor Oil

Features and Benefits of AMSOIL 0W-40 Signature Series Synthetic Oil

  • AMSOIL synthetic wear control
  • Resists piston, turbo and valve-train deposits
  • Designed to withstand extreme horsepower
  • Combats extreme heat of turbo-chargers and super-chargers
  • Resists oil consumption
  • Capable of ultra-long service intervals
  • Instant cold-start protection
2015 Dodge Challenger SRT Supercharged

AMSOIL 0W-40 Signature Series Synthetic Oil is a perfect fit for this 707 horsepower Dodge Challenger Hellcat. (photo credit:

The Finest Wear Prevention For Dodge SRT and Nissan GT-R Engines

AMSOIL’s 100% synthetic base oil along with a powerful anti-wear additive package offers the best possible protection for ultra-high horsepower engines. AMSOIL 0W-40 delivers a potent film strength that buffers internal engine parts from severe shock loads, high heat and sudden acceleration.

Designed To Withstand Extreme Heat

High horsepower, turbo-chargers and super-chargers also bring extreme engine heat. AMSOIL 0W-40 is designed to resist shearing or boil-off, so the oil viscosity stays consistent for its entire service life. This trait also prevents oil consumption. AMSOIL engine oils are famous for consistent dipstick readings in engines that are in good mechanical condition.

Fast Cold Start Protection

While you may need an engine oil to withstand high-horsepower in the summer, if you have a Grand Cherokee SRT or a Ram with a 6.4L engine, you also may need protection during winter starts. AMSOIL 0W-40 Signature Series Synthetic Oil pours down to -51°C (-60°F), so engine oil reaches vital engine parts immediately upon start-up in cold weather. Fast oil circulation is certainly desirable in any weather for your SRT or GT-R engine.

Mixing AMSOIL Synthetic 0W-40 with Other Brands

AMSOIL 0W-40 Signature Series Synthetic Oil is compatible with all other brands of conventional, synthetic-blend and full-synthetic motor oils. While you can safely mix AMSOIL Synthetic Oil with other brands, this will reduce the drain interval and performance capabilities of AMSOIL 0W-40.

Service Life of AMSOIL 0W-40 Signature Series Synthetic Oil

AMSOIL 0W-40 Signature Series Synthetic Oil is overbuilt for long service interval capability.

For Supercharged or modified* engines:

  • Up to 15,000 miles (24,000 km), 700 hours of running time or one year, whichever comes first.

For naturally aspirated engines (that are unmodified*):

  • Up to 25,000 miles (40,000 km), 700 hours of running time or one year, whichever comes first.

* Engines operating under modified conditions (non-stock) are excluded from extended drain recommendations. Examples include the use of performance computer chips; non-OEM approved exhaust, fuel or air induction systems; and the use of fuels other than those recommended for normal operation by the manufacturer.


Signature Series 100% Synthetic 0W-40 Motor Oil

Viscosity @ 100°C, cSt (ASTM D-445)


Viscosity @ 40°C, cSt (ASTM D-445)


Viscosity Index (ASTM D-2270)


VISC. CCS, cP (ASTM D-5293)

6062 (-35)

Flash Point °C (°F) (COC) (ASTM D-92)

222 (431)

Fire Point °C (°F) (COC) (ASTM D-92)

238 (460)

Pour Point °C (°F) (ASTM D-97)

-50 (-58)

NOACK (% weight loss) (ASTM D-5800)


High Temperature/High Shear Viscosity
@ 150°C, 1.0 X 106 s.-1), cP (ASTM D-5841)


Total Base Number (ASTM D-2896)


AMSOIL 0W-40 Signature Series Synthetic Oil
A synthetic engine oil designed for Dodge 6.4L, 6.2L, 6.1L, 8.3L, 8.4L V-8 and V-10 engines. Also suited for Nissan GT-R V-6 turbo-charged engines.
Manufacturer: AMSOIL
Model: 0W-40 Signature Series Synthetic Oil
Product ID: AZF