What Do The Letters In Motor Oil Mean

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What does the letters and numbers mean on motor oil?

Therefore, on the bottles of this type of oils, after the SAE you’ll find the letter W (from Winter) and a number indicating the oil’s viscosity at low temperatures. An oil with a low SAE W number will flow better, making cold starts easier and reducing engine wear.

What does the letters C and S stand for on engine oil?

At ILD Sinopec, we have an easy way to remember this i.e. S = Spark (Petrol engines) and C = Combustion (diesel engines). In some cases, a lubricant may contain both an S and a C in the name such as SM/CF which means the oil can be used in either a petrol or diesel engine.

Which is thicker 5w20 or 5W-30?

So, due to viscosity, 5w20 is a thinner oil during operating temperatures, whereas 5w30 is thicker during operating temperatures. A majority of manufacturers are now producing engines that operate on 5w20 oil, to which it’s important to stick to this viscosity and not substitute 5w30.

Is 10w30 thicker than 5W-30?

Suitable Vehicle Types. 5W-30 multi grade oil is ideal for private vehicles and light-duty petrol and diesel engines. It also provides a better cold temperature start than 10W-30 oil. On the other hand, the slightly thicker oil,10W-30, provides better lubrication for commercial vehicles and heavy-load engine cars.

Can I use 10w40 instead of 5W-30?

Your vehicle does not use 5W-30 oil. The recommended oil viscosity for your vehicle, according to Kia documentation, is 10W-40. If you drive the vehicle in exceptionally cold weather, well below 32 degrees, you can use 5W-30 oil but even 10W-40 is still perfectly OK to use if outdoor temperatures are below freezing.

Is 10w30 thicker than 10w40?

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.

What is an S rating on oil?

This bit of alphabet soup consists of two letters for each engine type. The letter “S” means the oil is suitable for gasoline engine and the letter “C” means it is suitable for a diesel engine.

What does W stand for in oil?

The “W” that you see on oil labels stands for the word “Winter” because this portion of the label shows the viscosity level of oil when an engine is cold. Motor oil that is thinner can flow more easily and faster. This is important because when you start a cold engine, the oil needs to lubricate the equipment quickly.

Can I use SN oil instead of SL?

SM and SN supersedes SL so both oils can be used.

What happens if you put 5W-30 instead of 5W20?

If you use 5w30 oil instead of 5w20 when it is not recommended or approved by your owner’s manual, it can void your car’s powertrain warranty, reduce engine efficiency, and possibly even damage your engine in the long run. Hopefully, this helps!

Should I use thicker oil in an older engine?

A: Yes. This is a practical method to improve oil pressure in an older, high-mileage engine. The slightly thicker oil film from the heavier base weight oil – 10W – can help protect worn engine bearings as well.

Will the wrong oil damage my engine?

Cause damage to engine life The wrong engine oil can cause engine damage because it does not properly lubricate its components. This will lead to metal-on-metal contact since the moving parts are not being lubricated. Friction quickly follows, causing engine parts to wear.

What happens when you put 10w30 in a 5W-30 engine?

Most oils will mix perfectly, provided they have a similar synthetic. Therefore, there is no problem in mixing 10w30 and 5w30 since one will be topping up. Mixing the viscosity of oils will not have any effect on the engine. 5w30 and 10w30 engine oils have close viscosity, and thus there is no harm in mixing them.

Can you put 10W40 in a 10w30 engine?

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. However, this is true only if you mix in a quart of the other type to your usual engine oil.

Will thicker oil damage my engine?

Using oil that is thicker than recommended may lead to a decrease in fuel economy, a higher load on your engine, and even a shorter life for your engine. Conversely, using thinner, lighter-weight oil than recommended can cause excessive wear and shorter life.

Is 10w40 good for high mileage?

Designed for high mileage vehicles Mobil 1 High Mileage 10W-40 motor oil is recommended by ExxonMobil for use in high mileage vehicles (even those that have used lower quality conventional oils†), including: Cars. Trucks.

Does thicker oil burn less?

Will Thicker Oil Stop Burning? What is this? Unfortunately, the thicker engine oil will not stop your car from burning oil. This solution has been brought up often, with the idea being that a more viscous oil will not flow as easily and have a more challenging time getting past worn-out valve guides.

What is 20w50 oil used for?

20W-50 is a common motor oil used in moderate-to-large diesel and gasoline engines, high-performance motorcycle bikes, and aviation vehicles. Its resistance to thinning at high heat also makes it popular as a racing oil and high temperature driving.

What happens if I use 10w30 instead of 10w40?

The only difference between 10w30 and 10W40 oils is the thickness at engine operating temperatures. They will flow equally well during cold startups since both formulations have a viscosity of “10” when reacting with air or other gases (surplus). If you want to help your engine warm up faster, use 10w30 oil.

How do I choose the right engine oil?

While there is a mountain of information about the various oil choices, the first step is honestly quite simple: Look in your car’s manual. The owner’s manual for your car will list its recommended oil weight, whether that’s a standard format like 10W-30 or something more unusual.

Is SP oil better than SN?

Oils may have more than one performance level. For automotive gasoline engines, the latest engine oil service category includes the performance properties of each earlier category. If an automotive owner’s manual calls for an API SN oil, an API SP oil will provide full protection.

What is C oil?

For these oils the designation is “C” category first followed by the “S” category. “C” category oils have been formulated primarily for diesel engines and may not provide all of the performance requirements consistent with vehicle manufacturers’ recommendations for gasoline- fueled engines.

Is Full Synthetic better?

Overall, full synthetic oils provide better engine performance and protection than conventional and synthetic blend motor oils.

Which is thicker 5W-30 or 5W 40?

Although both have the same viscosity grade in cold weather, 5W-40 is thicker than 5W-30 at warmer temperatures. It’s also worth pointing out that: 5W-40 is the suggested oil for most diesel applications. Rarely (if ever) do vehicle manufacturers recommend putting 5W-40 oil in a gas-powered engine.

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