When should I use thicker oil?

If, for instance, clearances between engine components have increased, gotten sloppy, a thicker oil can help to fill the void. Within reason, thicker oil maintains a better lubricant film between moving parts. Some have even used thicker oil in a leaky engine to prevent oil from seeping out.

Is it better to have thicker oil?

Thin oils have lower viscosity and pour more easily at low temperatures than thicker oils that have a higher viscosity. Thin oils reduce friction in engines and help engines start quickly during cold weather. Thick oils are better at maintaining film strength and oil pressure at high temperatures and loads.

What does thicker oil do for your engine?

Thicker Oil May Not Flow Quickly Enough

Its lower viscosity allows it to flow faster and fill the tiny clearances between parts, leading to a durable, consistent lubricating film.

Is it better to use thicker oil in cold weather?

The “W” in that number stands for “Winter”, and the number before it (the “10”, in this case) is the viscosity or thickness. When the cold weather comes, you want a lower number, meaning thinner oil, which will smoothly coat the insides of your engine even in the most frigid weather.

Is it better to run thicker oil in hot weather?

Engines need a thicker oil in the summer months because of the summer heat and its effects on thinning the oil out. When the weather cools down, you can switch back to a lighter, thinner oil, which will help preserve gas mileage in the winter months.

Pat's Perspectives - Thicker Oil (#2)

Should I use 10W40 in summer?

Either 10W30 or 10W40 for summer use is fine; however, 10W-40 motor oil will better protect your engine.

Is 5w30 or 10W30 better for summer?

Answer: There is absolutely no need to switch to 10W-30 motor oil in the summer if 5W-30 is an acceptable grade for your engine. While some car manufacturers still advocate the use of 10W-30 (or even 10W-40) as an appropriate engine oil option for summer use, it is completely unnecessary.

What oil is best for winter?

Synthetics remain fluid in cold weather to ease cold starts and improve wear protection. Synthetic oil is the best winter motor oil.

What weight oil is best for winter?

The lower the W number, the better the oil will perform in colder temperatures. Typically, a 5W oil is recommended for winter use, but synthetic oils can be formulated to flow even more easily when cold. This way, they are able to pass tests that meet the 0W rating.

Do turbo engines need thicker oil?

Because turbos spin hundreds of thousands of revolutions and they need really good lubrication. They need a little heavier oil.

Do high-mileage cars need thicker oil?

High-mileage oils have ingredients to take care of older engines, like conditioners, seal swells, antioxidants, detergents and wear or friction additives. Typically they use a viscosity modifier that is durable and won't lose viscosity very easily. These oils need to stay thicker longer to protect engine parts.

Is it OK to put 10w40 in a 5w30?

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.

Can I use thicker oil if my car is burning oil?

Will Thicker Oil Stop Burning? 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.

When should I use 20w50 oil?

A 20W-50 motor oil is typically used in older vehicles or in particularly warm climates. Castrol GTX 20W-50 has been specially formulated to help extend the life of your engine by keeping it free from sludge, even when operating in extremely high temperatures.

Is 5w30 oil thicker than 10w30?

Both the oils have similar viscosity at 100 degrees Celsius but 5w30 grade oil will thicken less than 10w30 grade oil in cold climate. This means 5w30 grade oil will flow effectively in low temperatures, whereas 10w30 oil will flow effectively in high temperatures because of the smaller temperature window.

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.

Which is better for winter 5W30 or 10w30?

Low Temperature Viscosity

Now, the lower the number before 'W' is, the less likely the motor oil will thicken at a low temperature. So when you compare 5W30 vs 10W30, 5W30 oil has a lower number (5), implying the oil thins fairly in an extremely low temperature, making it a better winter engine oil than 10W-30.

Is it OK to put 5W30 in a 10w30?

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.

Is 5w40 good for winter?

5w40 and 5w30 motor oils have winter viscosity grades of five, meaning they are effective down to temperatures of -30°C, and are more viscous at very low temperatures, compared to, say, 10w40 oils.

Do I need different oil for cold weather?

Generally, 5W-30 is widely recommended because it's actually good to use year-round. If you're using a higher viscosity oil than that, your user manual may recommend changing to a lower viscosity for the winter.

Is it OK to change oil in cold weather?

To keep your car in tip-top shape during winter, the best cold 'remedy' for your vehicle is an oil change. Cold temperatures can cause your oil to flow slowly or not at all – which puts a lot of stress on your engine.

Is 10w30 better for high-mileage?

10W-30 motor oil makes for a decent high-mileage oil. It gives a better fuel economy while reducing the oil consumption for older engines. Older engines with more than 75,000 miles on them require a thicker oil that will properly lubricate their critical engine parts and prevent oil leaks, sludge, and deposits.

Should I use 10w30 or 10w40?

There's not much difference between 10W-30 and 10W-40 motor oil. What sets them apart has more to do with temperature fluctuations and engine load. For moderate weather, either engine oil grades should work fine. Your choices will become more critical when you start getting into high-heat situations.

Which engine oil is best for hot weather?

The ideal motor oil for your car is one that can withstand the hottest temperatures in your region while still being able to flow when the weather is at its coldest. SAE 5W30 oil is suited to a broad range of temperatures, making it one of the most commonly used oils on the market.

What is 10W 40 oil used for?

Higher viscosity oil such as a 10W-40 can be useful for older engines burning or leaking oil. We offer Mobil™ 10W-40 high viscosity motor oils for use in vehicles with more than 75,000 miles, and a synthetic blend oil when cost is a consideration.