Will 5w40 hurt a 5w30 engine?

‘ Yes, you can depend on the temperature range. 5W30 and 5W40 oils are mainly used for winter or cold temperature; still, they have thinner quality for the hot temperatures, like 5W30 can be used from -30° to 30° temperature range and 5W40 can be used from -40° to 40° capacity.

Is 5w40 better than 5w30?

In practice, this means that each oil is just as viscous at lower temperatures and will remain viscous at -30°C, however 5w40 oil outperforms 5w30 oils at higher temperatures, being effective up to ambient temperatures of 50°C, as opposed to 30°C.

Which is heavier 5w30 or 5w40?

5w30 is engine oil that has lower viscosity 5 and higher viscosity 30. … 5w40 oil is not thicker has it has a higher viscosity. Temperature. 5w30 has lower viscosity hence it is suitable to use in hot or lower temperatures.

Will 5w40 hurt a 10w30 engine?

For most vehicles, a 30wt is sufficient viscosity when hot and has major advantages (it’s thinner) when the oil is below operating temperature. No, not at all. Some oil stays behind, so your first change will have 15% or so of the 10W-30 mixed in. By the third oil change it will be 100% 5W-40.

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Can I switch from 5w40 to 5w30?

In most cases, if they recommend SAE 5W-40, then SAE 5W-30 may cause problems with wear or even engine damage. SAE 5W-40 will always be “Thin” enough at any temperature, but SAE 5W-30 may be too “Thin” at high temperatures.

What happens if I put 5w30 instead of 5w40?

What would happen if I use 5w30 oil instead of 5w40 in my car engine? – Quora. , Over 200,000 miles on 2-wheels and 2 crashes. So long as the oil pump can produce enough pressure to get the oil flowing into all the important areas properly, there should be no problem.

Can I put 5w40 in my BMW?

The Castrol oil that BMW used to spec was midway between a 30 and 40 weight. Anything from 0W30 to 5W40 will be fine if it has the LL-98 or LL-01 rating. You don’t even need that if you are running shorter change intervals.

Is 5w40 better for high mileage cars?

5w40 is often used in cars whose engines have higher mileage and wear, which work better at higher temperatures, but also better than 5w30 at lower temperatures.

What does 5W-30 stand for?

The short answer:The numbers represent the viscosity of the oil and the W stands for WINTER. … In a 5W-30 for example, the number before the W describes the viscosity of the oil at low temperatures. The lower the number, the thinner the oil and the better the oil’s cold temperature/ cold start performance.

What happens if I put 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.

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What happens if I put 10W40 instead of 5W40?

Yes. 10w40 is thicker than 5w40, it will not lubricate all the parts that need lubricating from cold. You’d probably be better of leaving the old oil in there than swapping the correct (but old) oil for incorrect (new) oil.

Is Thicker oil better for high mileage cars?

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.

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