Is higher weight oil thicker?
You might be familiar with terms such as “30-weight” or “10W-30” oil. Those numbers refer to the grade. The higher the number, the thicker the oil. The lower the number, the thinner.
Is 30 weight oil heavier than 10W30?
10w30 acts like 10w and is thinner in a cold engine, and like 30 weight, thicker, when the car is hot.
Is 15w40 oil thicker than 30 weight?
They both have the same thickness at operating temperature. The 0W-30 simply does not get as thick on cooling as the 10W-30. Both are still way too thick to lubricate an engine at startup.
Is 20W 50 thick oil?
The “20W” indicates how quickly the engine will start when cold or in cold weather. The “50” refers to the thickness of the oil when the motor has been running for a while. 20W50 motor oil is relatively viscous and thick. Most modern oils are 10W40 or even 5W40.
What’s the difference between a 10 and a 30 weight oil?
A 10w-30 oil has the flow characteristics of a 10 weight when cold (so lube can be rushed to where it needs to go) but a 30 weight when at operating tempeature. Oil DOES NOT get thicker as it warms up. It gets thinner. The viscosity diferential is less from hot to cold with a 10w-30 then with a straight 30 weight.
What’s the difference between a 10W and a 40?
Right, the oil gets thinner. I think oil is actually a combination of two different oils, the 10W is the viscosity of the first oil at cold temp, and the 40 is the viscosity of the 2nd oil while it’s hot. W = winter.
When to use 30 or 40 motor oil?
David – November 2, 2017. The second number (30 or 40) are the thickness when the oil is at 212°f, which is the normal temperature of the engine, independent from outside temperature, no matter if it is freezing or boiling outside, the engine is configured to run at around 212°f.
What do the numbers on the oil weight mean?
Oil weight is a term used to describe the viscosity of an oil, which means how well it flows at a specific temperature. The Society of Automotive Engineers (SAE) assigns a viscosity number, or weight, to oil based on its flow at 210 degrees F, which is roughly the standard operating temperature for most motors.
A 10w-30 oil has the flow characteristics of a 10 weight when cold (so lube can be rushed to where it needs to go) but a 30 weight when at operating tempeature. Oil DOES NOT get thicker as it warms up. It gets thinner. The viscosity diferential is less from hot to cold with a 10w-30 then with a straight 30 weight.
Right, the oil gets thinner. I think oil is actually a combination of two different oils, the 10W is the viscosity of the first oil at cold temp, and the 40 is the viscosity of the 2nd oil while it’s hot. W = winter.
When to use 40 weight AMSOIL engine oil?
The only time we recommend a 40 weight oil, such as AMSOIL ‘s 10W-40, to a customer in a passenger car or light truck application is if the vehicle’s engine is excessively worn and consumes oil at a higher than normal rate or if the vehicle is being used for very severe duty, high load, high temperature applications.
What should the oil weight be on a car?
If you used a straight oil weight of 30, then the lubricant would be too thick to shoot quickly through the engine when starting on a cold day, which means it would fail to properly protect crucial parts from damage. At the same time, you wouldn’t want to run a straight 5 weight oil either, because it would be too thin to keep a warm engine safe.