Numbers you find on different oil cans, such as SAE 30 or SAE 10W-30, are viscosity or weight numbers that indicate the thickness of the oil. The higher the number, the thicker is the oil. As earlier mentioned, SAE stands for Society of Automotive Engineers. SAE established the grading system, which includes a numerical code system.

Is 10W-40 heavier than 10w30?

Engines that run high operating oil temperatures require higher viscosity oil. The difference between 10W-30 and a 10W-40 is the high temperature viscosity. Obviously, a 10W-40 is thicker than a 10W-30 at high temperature.

Can I mix 10W40 with 10w30?

Mixing 10W30 with 10W40

Some say that mixing them is fine as long as you don't live in freezing weather. Even if you put together synthetic and conventional blends of these motor oils, they show no harm to your vehicle.

When should I change my oil viscosity?

When the viscosity is too low, it can also lead to increased friction between metal surfaces, lower lubricant pressures and higher flow rates. The best policy when changing your oil viscosity is to test your oils more frequently in order to ensure that you do not end up with a catastrophic equipment failure.

Related Question what do oil weight numbers mean

Is it bad to use a heavier weight oil?

Using a heavier grade than recommended may cause decrease in fuel economy, higher engine loads and eventually shortened engine life. Using a lighter grade than recommended may result in excessive mechanical wear and reduced engine life.

What do numbers mean on engine oil?

The short answer:The numbers represent the viscosity of the oil and the W stands for WINTER. In a 5W-30 for example, the number before the W describes the viscosity of the oil at low temperatures. The lower the number, the thinner the oil and the better the oil's cold temperature/ cold start performance.

When should I stop using synthetic oil?

When it comes to how often change a full synthetic oil we recommend following a car manufacturer's oil change intervals. Most of the automakers today require oil changes at either 7,500 or 10,000 miles, and the interval can go up to 15,000 miles in some cars.

What is 5W 40 oil used for?

The 5W-40 viscosity is a prevalent recommendation for performance engines in European vehicles with gas-powered engines, and in American diesel pickup trucks. We offer 5W-40 oils for gasoline- and diesel-powered engines.

Is synthetic oil bad for older engines?

It protects better, performs better, and lasts longer, and it's no longer made with a chemical compound that could hurt older vehicles. Modern synthetic oil is safe to use in all types of vehicles, ranging from new purchases to classics to aging not-so-classics.

Do you fill oil filter when changing oil?

An age-old question is whether or not you should pre-fill your new oil filter before installing it in your vehicle. The answer? Pre-filling the filter makes the process easier if you have a large, heavy-duty truck, but if you're just changing the oil in a smaller car, it's not necessary.

Is 0W 20 oil too thin?

Answer: Yes, 0W-20 is unquestionably safe for your engine. Manufacturers have been specifying 5W-20 and 0W-20 since the early part of the last decade and there is no evidence whatsoever that engine wear rates have increased.

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