Technical articles
Knowledge that protects engines

Practical, independent explanations of oil specifications, viscosity, lubrication, engine protection, and automotive fluids.

25 articles 4 topics
Automotive lubricant testing in a modern laboratory

Featured insight

A technician adds engine oil to a premium European heavy-duty truck.
Specifications Explained

New Mercedes Heavy Duty Specifications

Introduction The previous MB commercial vehicle guidelines are being updated and replaced. New Requirements by Daimler Truck Daimler Truck has introduced a new, independent set of requirements for engine oils and other lubricants used in...

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Specifications Explained A fleet technician inspects an engine oil sample beside heavy-duty diesel trucks.

API CK-4 and FA-4 Specifications in a Nutshell

The American Petroleum Institute launched two new diesel specifications in 2016. The specification criteria were revealed last winter and the first claims can be made starting from December 1st, 2016 so oil manufacturers have time...

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Oils and Lubrication A mechanic compares fresh and used motor oil during an oil drain service.

About Oil Drain Intervals

Many car owners still believe that the motor oil should be changed once in every 5000 miles. It's not that simple. Vehicle manufacturers usually set two oil change intervals: one of them is measured in...

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Oils and Lubrication A mechanic adds fresh motor oil during a scheduled oil and filter change.

Why does the motor oil need to be changed regulary?

The motor oil costs only a small fraction of the total amount that you spend on your car but choosing the right oil can save you large sums. Low quality or overused motor oil is...

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Things to Know About Viscosity Low-viscosity oils move through precision laboratory flow channels.

Introducing the SAE 8 and SAE 12 Viscosity Grades

On January 20, 2015 the Society of Automotive Engineers, better known by its acronym as SAE added two new viscosity grades to its most popular viscosity classification system defined under the SAE J 300 standard....

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Things to Know About Viscosity Golden motor oil demonstrates different flow behavior at cold and warm temperatures.

What is Oil Viscosity a.k.a. Oil Weight?

Viscosity is a fluid’s resistance to flow. In case of lubricants the viscosity is very important because it affects the oil’s ability to reduce friction and transfer heat. The viscosity is measured in mPa*s (millipascal-seconds)...

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Things to Know About Viscosity Low-viscosity golden oil flows through transparent channels around precision bearings.

The SAE 16 Viscosity Grade

On April 1, 2013 the Society of Automotive Engineers (SAE) introduced a new viscosity grade called SAE 16. This is a new high temperature viscosity grade hence it's not 16W just simply 16 or SAE...

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Oils and Lubrication A mechanic checks a car engine oil level while preparing the vehicle for winter.

10+1 tips to prepare your car for the winter

To help you to prepare your car for the winter oilspecifications.org compiled a checklist about the most important things to do to make sure that your car is appropriately prepared for the winter. This checklist...

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Specifications Explained An engineer inspects a motor oil sample beside a gasoline engine test stand.

API SN Engine Oil Category

In 2010 the American Petroleum Institute introduced a new engine oil category under the name API SN and a new supplemental category called Resource Conserving. The API SN category is an improvement over the API...

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Specifications Explained A mechanic services the wet clutch assembly of a modern motorcycle.

JASO MA and JASO MB classifications

Modern motorcycles usually have the same oil lubricating the engine and the wet clutch. For this purpose most of the time the regular friction modified engine oils are not good enough. To make sure that...

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Oils and Lubrication Lubricants, bearings, gears, piston rings, and laboratory glassware arranged on a workbench.

Lubrication glossary

Additive A compound mixed to the base oil in order to modify its properties or performance. Base Oil Usually refined crude oil fraction or selected synthetic base stock. Additives are mixed to them during lubricant...

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Oils and Lubrication A cutaway engine shows oil paths around pistons, valves, and a turbocharger.

What Are The Reasons of Oil Consumption?

One of the dreaded things car owner face is oil consumption. For some people the only time when they have to do anything motor oil related is the time when they find out that its...

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