What Does Viscosity Mean and Its Importance?

How does viscosity affect your engine, mileage and performance?

Motor oil viscosity is the measure of its resistance to flow. Low-viscosity oil (e.g. 0W-20) flows faster than high-viscosity oil (e.g. 20W-50).

To illustrate, think of water and honey. When poured from a container, water flows much faster than honey.

For more good information on oil viscosity including easy to understand charts, read this blog:

What Does Viscosity Mean (and How Does it Affect Your Engine)?

Signature Series Keeps Engines Cleaner Than Other Synthetic Motor Oils

AMSOIL Signature Series

In general, the higher an oil’s TBN, the better its ability to neutralize contaminants such as combustion by-products and acidic materials. Higher TBN oils neutralize a greater amount of acidic material, which results in longer oil life and cleaner engines.

TBN levels decrease as the oil remains in service. When the level reaches a point where it can no longer protect against corrosion, the oil must be changed.

The TBN Test

The Total Base Number Test (ASTM D2896) uses a series of chemical reactions to measure the alkaline additives in a motor oil. We recognize the value of formulating motor oils with high TBN, and AMSOIL Signature Series Synthetic Motor Oil features the highest TBN of the oils tested.

AMSOIL Signature Series is fortified with a heavy treatment of detergent additive and it delivers 30% more acid neutralizing power1 than Mobil 1, and 36% more than Royal Purple, helping engines to stay cleaner, longer.

The AMSOIL Advantage

AMSOIL synthetic lubricants feature a large dose of quality additives that consistently deliver high TBN for the life of the oil. They neutralize acidic contaminants and keep them in suspension to maximize engine protection. AMSOIL lubricants use detergent and dispersant additives to significantly reduce sludge and carbon deposit formation. In the Total Base Number Test (ASTM D2896), AMSOIL Signature Series 5W-30 Synthetic Motor Oil demonstrated the highest TBN of the oils featured in the test, helping it deliver reliable protection for extended drain intervals.

1Based upon independent testing of Mobil 1 Annual Protection Full Synthetic 5W-30, Royal Purple High Performance 5W-30 and AMSOIL Signature Series 5W-30 in ASTM D2896. Oils purchased 05/03/18.

All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use. All products advertised here are developed by AMSOIL for use in the applications shown.

AMSOIL Signature Series Battles Sludge

AMSOIL Signature Series Battles Engine Sludge

Synthetic motoroil

The health of your engine depends on motor oil circulating quickly and efficiently through the system, but sticking components and obstructed passages inhibit motor oil from lubricating, cooling and protecting your engine. Engine “sludge” occurs when oxidized oil and contaminants build up on engine surfaces. It can restrict the flow of oil to the point of engine failure and costly repairs.

Sludge: Where It Starts & How It Ends

The valve cover and oil pan are generally the first areas sludge appears.
The oil pick-up tube screen is often the next spot it accumulates, impeding oil flow through the system.
What begins as a thin film of lacquer or varnish deposits eventually bakes into an expensive mess.

The Sequence VG Engine Test

Engine failures due to sludge are often caused by a clogged pick-up tube screen – the motor is effectively starved of oil. The Sequence VG Engine Test determines how well an oil resists sludge formation and keeps the lubricant flowing freely throughout the system. The test is required for API SN PLUS – a specification recommended by most domestic vehicle manufacturers.

TEST PARAMETERS

Engine

Ford* 4.6L V-8 

Duration

216 hours

Measures

Sludge and varnish deposits, piston ring sticking, clogged oil pump screens and roller pin wear

Simulates

Taxi, delivery or commuter vehicle service

Requirement

Oil pick-up tube screen limited to 10 percent blockage

The Results

Signature Series Synthetic Motor Oil was subjected to the Sequence VG to measure its ability to prevent sludge. As expected, Signature Series produced an oil pick-up tube screen virtually free from sludge (see image). Our unique combination of detergents and high-quality base oils control oxidation and sludge to keep engines clean and efficient. 

Signature Series has 50 percent more detergents1 to help keep oil passages clean and promote oil circulation. It provides 90% better protection against sludge2.

1 vs. AMSOIL OE Motor Oil 
2 Based on independent testing of AMSOIL Signature Series 5W-30 in the ASTM D6593 engine test for oil screen plugging as required for the API SN PLUS specification.   
*All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use. All products advertised here are developed by AMSOIL for use in the applications shown.

Premium Protection for High-Horsepower Ford Mustangs

5W-50 Synthetic Motor Oil

AMSOIL Signature Series 5W-50 Synthetic Motor Oil

AMSOIL has expanded the Signature Series line to include a robust 5W-50 synthetic motor oil formulated specifically for high-horsepower Ford Mustang engines. Signature Series 5W-50 Synthetic Motor Oil (AMR) provides top-of-the-mark protection and performance that customers expect from Signature Series, and it is excellent for all Mustang engines calling for a 5W-50 viscosity.

For more information:

AMSOIL Signature Series 5W-50 Synthetic Motor Oil for High-Horsepower Ford Mustangs