What does the 15 stand for in 15W40?

In 15W-40, the first number on the left (15 here) represents the cold temperature viscosity and contains the letter “W” (which stands for winter, engineers are so creative). For example, a 5W-40 oil will be thinner in cold temperatures than a 15W-40, but at normal operating temperatures both oils will flow the same.

What does SAE oil mean?

Motor oils use a rating system developed by the Society of Automotive Engineers (SAE), to classify oil by viscosity.

What is the difference between 1040 and 1540?

A 10W40 oil will be thicker in the cold than 15W40 oil, but they will have the same viscosities at higher temperatures. A lower number indicates that the cold oil will be thinner, hence applying less static friction on the engine, and less drag. Oil settles at the bottom of the engine when it is cold.

Can I use SAE 15W40?

MOTOR OIL UNIVERSAL SAE 15W/40 was developed for four-stroke petrol and diesel engines with or without turbos; it can be used in commercial vehicles, work machines or industrial units as well as passenger vehicles, making it the ideal motor oil for a mixed fleet of vehicles.

What is 15W 40 oil used for?

ADVANTAGE 15W-40 HEAVY DUTY DIESEL ENGINE OIL can be used with complete success in over-the-road diesel trucks, off-highway diesel equipment, farm tractors, and passenger cars and light trucks with diesel, turbo-charged diesel engines, or gasoline engines and is backward compatible with previous API Oil Categories.

What is the difference between SAE 40 and 15w40?

An oil with an SAE viscosity grade 5W-40 behaves like a 5W oil at low temperatures (the “W” stands for winter) and a 40 at higher temperatures. In general, in a given engine at operating temperature a 5W-40 and a 15W-40 have the same viscosity; one will not be “thinner” or have a lower viscosity than the other.

What does SAE stand for in motor oil?

SAE stands for Society of Automotive Engineers and SAE 40 is a automotive lubricant/Motor oil being used. 40 denotes the grade of the oil. Higher is the numerical value, higher is the viscosity. These lubricants in IC engines are used for reducing wear and tear, inhibiting corrosion and provide sealing.

What does “15w40” mean?

“15W40” refers to the viscosity grade of a multi-weight oil, where 15W refers to a cold grade of 15 and 40 refers to its viscosity grade at running temperatures. The higher the viscosity grade, the thicker the oil is, which affects its lubrication ability, heat capacity and flow. Normally,…

What is SAE 40 oil?

SAE 40 is synthetic oil derived from natural or crude oil. Here, SAE stands for Society of Automotive Engineers and 40 refers to viscosity of the oil. In layman’s term we can say 40 is thickness of oil. More is the thickness, lesser is the contact between metals, which increases the life of engine.