Question: What Is 10w40 Oil Good For?

What does 10w40 oil mean?

The lower the “W” number the better the oil’s cold temperature/cold start performance.

The 40 in a 10w-40 simply means that the oil must fall within certain viscosity limits at 100°C.

Once again the lower the number, the thinner the oil: a 30 oil is thinner than a 40 oil at 100°C etc..

Is 5w30 better than 10w40?

The main difference between the 5w30 and 10w40 is the viscosity difference at different temperatures. … The one, 5w30, will be able to flow better when the temperatures are low than the 10w40. So at a lower temperature, the 5w30 oil will be the best to protect the engine.

What happens if you put 10w40 instead of 10w30?

Changing from 10W30 to 10W40 will not do any effect on your engine if you choose right one for the right season. Engine oil is one of the main part for the engine. The grade given on the bottle of engine oil 10W30 or 10W40 it just indicates the suitable oil for different season.

Should I use thicker oil in summer?

As a general rule, you’ll get the best protection in the summer when you use a slightly thicker grade of oil, such as a 10W30 instead of a 5W30. Engines need a thicker oil in the summer months because of the summer heat and its effects on thinning the oil out.

Do you use thicker oil in winter?

Thin oils that are less prone to thickening in low temperatures will help you start your engine more quickly in winter while thick oils that are less prone to thinning in hot temperatures will help your engine perform better in summer.

Will 10w40 hurt a 5w20 engine?

In a 5W20 engine. You could use a 0W20 oil (I use 0W20 oil) in cold weather and it would be Ok by Ford. (they will not say it is good, but they will still honor the warranty..) But 10W40 is way off, and I bet they would be not so happy over any engine problems if they found 10W40 in a failed engine.

Why do older cars burn oil?

Because of wear, vehicles are more likely to consume engine oil as they age. … Common culprits that result in burning oil include worn valve stems, guides and seals, and piston rings, all of which can allow oil to seep into combustion chambers.

Does thicker oil help with leaks?

As an engine heats up, the oil thins, becoming more susceptible to leaks through faulty gaskets. Draining the oil from your vehicle and replacing it with a thicker weight or synthetic oil can help to prevent oil from leaking through some of the smaller breaks in the gasket seals.

Is 10w40 good for high mileage?

The slightly thicker oil film from the heavier base weight oil – 10W – can help protect worn engine bearings as well. As long as you’re not hearing knocking or serious mechanical noises from the engine, the heavier oil should buy you many more miles of service from your vehicle.

What happens if you put thicker oil in your car?

Low efficiency. Using motor oil with higher viscosity (oil that is too thick) also reduces your car’s overall fuel efficiency. This is because the thicker the motor oil, the higher its resistance on vital metal components, such as pistons.

What happens if you put wrong oil in car?

You might notice a few oil spot in your garage or under your car because using the wrong oil can lead to leaks, or you might become aware of a burning smell while driving. If the oil isn’t working as it should engine parts might not be lubricated well enough and cause friction, which can burn the oil.

For Example: 10W30 Low viscosities are good for cold temperatures (hence the “W” association) because the oil is thinner. Thinner motor oil flows more easily and moves quickly. When you start a cold engine up again, motor oil needs to travel to the top of the engine, where it trickles back down.

What is the best engine oil for high mileage?

5 Best Motor Oils for High Mileage Engines#1 – Mobile 1 High Mileage Synthetic Oil.#2 – Royal Purple HMX Synthetic Oil.#3 – Mobile Super High Mileage Synthetic Oil.#4 – Castrol GTX High Mileage Synthetic Blend Oil.#5 – Pennzoil High Mileage Synthetic Blend Motor Oil.

Which oil is thicker 5w40 or 10w40?

The 5W40 is thinner than the 10W40 at lower temperatures. But when the temperature is higher, both motor oils similarly perform their intended functions (using the same viscosity). … On the other hand, the 10W40 motor oils are thicker than the 5W40 oils for good reasons.

Does thicker oil protect?

Use the oil required by the manufacturer, thicker oil does not necessarily provide more protection. Older engines with less precise tolerances sometimes required higher viscosity oils, especially at higher temperatures. Thicker oil is not always better.

When should I use 10w40 oil?

Overall the 10W30 will be the more appropriate oil for cold weather and non-performing engines while 10W40 is perfect for warmer temperatures and older vehicles.

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

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 Thicker oil better for older engines?

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.

Is 20w50 good for high mileage?

The viscosity level of engine oil 20W50 is geared toward racing engines, as opposed to high-mileage engines, that run extremely hot and need heavy load operation. … Since its viscosity is so great, it can drag down the functioning of the crankshaft, resulting in less horsepower.

Is 10w40 good for winter?

Yes, although they are both technically 10w oils, a 10w-40 is much thicker in cold conditions compared to a 10w-30.

Is synthetic oil thicker or thinner?

Conventional oils will thicken in cold weather and thin out when very hot, while the viscosity of synthetic is much more uniform. Check your owner’s manual — many newer models require a thinner, lower-viscosity oil, which also helps the engine run more efficiently.