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.

Should you 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.

Is 20W50 thicker than 10w40?

Is 10w40 good for high mileage? 10W40 is not better than 20W50 for high mileage. The difference between 10w40 and 20w50 is simply that the latter is thicker. As far as gas mileage goes, no oil will improve your gas mileage by changing from 10W40 to 20W50 or vice versa.

What happens if I use 10W40 instead of 10W30?

Between a 10W-30 and 10W-40, 10W30 motor oil would run smoother in colder climates while a 10W40 would be more effective in preventing engine wear and tear in warmer temperatures.

Related Question what weight oil for high mileage engine

Should I use a heavier weight oil high mileage car?

High-mileage motor oil doesn't hurt and it could prevent leaks from starting. Some mechanics recommend switching to a thicker (higher viscosity) oil — such as 10W-30 full synthetic oil instead of 5W-20 full synthetic — or using oil additives to stop leaks.

Is 5W-30 oil good for high mileage?

Amazon Basics Full Synthetic is the best 5w30 oil for high mileage vehicles. This oil should only be used on vehicles exceeding 75,000 miles. This motor oil is formulated for longer drain intervals. It helps in preventing a build-up on drain intervals and preventing rust and corrosion.

What oil is thicker than 5w30?

10w30 is thicker than 5w30 because it has a higher viscosity in low temperatures. The engine oil will flow slower than 5w30 during the cold season. Thicker or higher viscosity metal oil has a better seal compared to low viscosity oil. Thicker oil offers better lubrication of motor and engine parts.

Can you put 10w40 in a 5w30 engine?

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.

What car uses 20w50 oil?

Suitable Vehicles

Depending on the recommendations for the particular vehicle, 20W50 oil is suitable for large or small diesel engines, gasoline engines, motorcycles and aviation vehicles. It is also suitable for both air- and liquid-cooled engines.

Which engine oil is best for hot weather?

Best Motor Oil for Hot Weather

  • Valvoline Advanced Full Synthetic 10W-30 Motor Oil.
  • Shell Rotella T5 Synthetic Blend 10W-30 Diesel Motor Oil.
  • Castrol Edge Advanced Full Synthetic 10W-40 Motor Oil.
  • Valvoline High Mileage with Max Life Synthetic Blend 10W-40 Motor Oil.
  • Mobil 1 Advanced Full Synthetic 10W-30 Motor Oil.
  • What does 10W30 stand for?

    The 10W30 designation on engine oil means that the viscosity of the oil is rated at 10W when an engine is cold and 30 when the engine is hot. This is different than an oil labelled 5W30, which has a thinner viscosity when the engine is cold at 5W.

    Can I use 10w50 instead of 10W40?

    Can I use 10w50 instead of 10W40? If you have a modern engine that calls for 10W-40, it will not benefit from the increased protection of a 10W-50 oil. You should just use the manufacturer's recommended grade for your make and model of vehicle.

    Can you mix 10W and 15W oil?

    If both have the same specs bar the 10W then it wont hurt 10W means at 10 degrees and 15W 15 degrees outside temperature, so adding 10w wouldn't do much in temperature wise as long as both are semi or so on with the same API specs.

    Can I put synthetic oil in my car after using regular oil?

    Yes. It is possible to use synthetic oil after using regular oil. However, it is important to contact your car manufacturer on whether you can use synthetic oil on the engine. Synthetic oil makes the engine performance smoother and steady.

    Will the wrong oil damage my engine?

    Using the wrong fluid can cause poor lubrication, overheating, and possibly transmission failure. A mechanic might not be able to reverse the damage, even by flushing the transmission. Mistakenly adding motor oil or brake fluid can also destroy your transmission.

    Which oil is thicker 5w40 or 15w40?

    In general, in a given engine at operating temperature a 5W-40 and a 15W-40 have the same viscosity; one will not be “thinner” or have a lower viscosity than the other. Both will have a viscosity of a 40 grade. That cannot be said for both oils during the dead of winter.

    What is the difference between 5w 30 and 10W-40 motor oil?

    A 10w-40 motor oil is a thicker oil at startup than a 5w-30 motor oil. Therefore, 10w-40 oil clings to the engine's moving parts more than the lower viscosity 5w-30 oil.

    Is High Mileage oil thicker than regular oil?

    High mileage oils contain viscosity modifiers that are durable and won't diminish over time. This causes the oil to stay thicker for longer periods of time, helping protect your engine parts.

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