Do high mileage engines 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.

Should I use thicker oil in a high mileage engine?

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 high mileage oil thicker or thinner?

Newer vehicles can utilize thinner oils for faster lubrication of new engine parts. In contrast, older, high-mileage engines benefit from thicker oils to prevent friction and oil loss.

When should I use thicker oil?

There are some circumstances where drivers have used thicker oil in an engine. 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.

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Which oil is best for high mileage engines?

Best Motor Oil For High Mileage Engines

  • Valvoline (VV150-6PK) MaxLife 10W-40 Higher Mileage Motor Oil. …
  • Pennzoil High Mileage Vehicle Oil. …
  • Mobil 1 45000 5W-30 High Mileage Motor Oil. …
  • Castrol 06470 GTX 20W-50 High Mileage Motor Oil.

What happens if I use 10W40 instead of 5w30?

If you use 10-w-40 instead of 5-w-30 specified by the manufacturer then the viscosity of 10-w-40 used by you will be higher and oil thicker than what is specified during winters. Similarly the oil viscosity will be higher and oil thicker than specified during summers.

Which oil is thicker 5w30 or 10W40?

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.

When should you use 20W50 oil?

20W50 motor oil is suitable for warmer climates, where the higher temperature causes the oil to thin. It is also useful for vehicles subject to hot temperatures and for those used for high-stress activities such as hauling or pulling trailers.

Is high mileage oil a gimmick?

No it is not a gimmick. Long-life oils have a lot of additives in them to enable them to function effectively for around 50% longer than a regular oil of the same spec. “High Mileage Oil” is basically just thicker.

What happens if engine oil is too thick?

If the oil is too thick (aka, the viscosity is high), your car may not start in cold temperatures (cold weather places more strain on a vehicle in any case). When this happens, the thick liquid can’t properly lubricate every part, and it creates enough resistance to impair the most important function–ignition.

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Which is better 10W30 or 20W50?

The second number refers to the oil’s viscosity – 30 is thinner, 50 is thicker. A 10w30 is lighter but thinner than a 20w50. A 20w50 is heavier but thicker than a 10w30.

10w30 vs 20w50 Table.

10w30 20w50
Ideal for engines over 75,000 miles Specifically formulated for race-level protection

Is it OK to use 0w20 instead of 5w30?

Pennzoil’s 0W synthetic motor oils offer the same protection as SAE 5W and gives the additional benefits of faster flow at start-up, enables faster engine warm up and delivers better fuel economy.

Is 10W30 the same as SAE 30?

Is SAE 30 The Same As 10w30? SAE 30 and 10W30 aren’t the same. SAE 30 is an oil that has a viscosity of 30 at overly high temperatures. The 10W30, on the other hand, has a grade 10 viscosity at low temperatures and grade 30 viscosity when the temperature is high.

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