Signature Series: The Measure of Performance – NOACK

In the NOACK volatility test, Signature Series scored far below the API limit for oil evaporation and proved it remains where it needed most – protecting your engine.

Nearly 35 years ago, Amsoil became the first oil manufacturer in the United States to use the NOACK Volatility Test as a measure of motor oil excellence, and today, it’s the industry standard. Originally developed and used in Europe, the NOACK test was not commonly used for lubricants until AMSOIL Founder Al Amatuzio pioneered its use for automotive motor oils in 1985. Previously, a lubricant’s flashpoint was the primary way to approximate its volatility.

Oil Volatility: Feeling the Burn

Modern engines generate more heat than their predecessors. At elevated temperatures, the oil’s lighter weight molecules can volatilize, or burn off. The more volatile a lubricant is, the lower the temperature at which lubricant will begin to evaporate. The more it evaporates, the less oil is left to protect the engine, and frequent top are required.

Volatility affects more than the rate of oil consumption. When lighter elements and oil evaporate, the oils viscosity increases. This thicker oil forces the engine to work harder and can result in numerous problems.

  • Reduced performance
  • reduce fuel economy
  • poor cold temperature starting
  • increased engine deposits
  • out of balance oil formulation, potentially leading to reduced protection


Signature Series Limits Oil Consumption

Signature series has a uniform molecular structure that limits evaporation and keeps it where it’s needed most – protecting your engine. It limits the volatility (burn off) that occurs when oil gets hot, protecting against the harmful effects of:

  • oil thickening,
  • additive imbalance,
  • higher emissions and oil consumption.

A lower NOACK number indicates better resistance to evaporation. Signature Series Motor Oils fall far below the API limit the volatility, reducing the need for frequent oil top offs and limiting vehicle emissions.

Signature Series Fights Wear

Signature Series provides 75 % more engine protection horsepower loss and wear than required by a leading industry standard extending the life of of vital components like pistons and cams.

Signature Series Guards Turbos

Signature Series protects turbochargers 72% better than required by the GM dexos1 Gen2 specification.

Signature Series Protects Against LSPI

Signature Series achieved 100% protection against LSPI

Signature Series Cleans

Signature Series has 50% more detergents to help keep oil passages clean and promote oil circulation. It provides 90% better protection against sludge.



Look at the oil’s pour point to gauge its ability to flow quickly at start-up. Pour point is the coldest point at which oil will flow. Lower values equal improved cold flow and maximum wear protection. Amsoil signature series 5W 30 synthetic motor oil for example provides a pour point of -50°F.



Not sure if this is right for you? Contact Dave Consalvo to get all your questions answered.