Can you use 10w40 instead of 5w30?

If your handbook recommends SAE 5W-30 AND SAE 10W-40, then you can change by all means, but the only difference will be slightly worse fuel economy and slightly harder starting when cold.

Can I use 10w 40 instead of 5w30?

If your car’s recommendations say to use 10w-30 that means you should not use 5w-40 because it acts in a different way whether at cold or at operating temperature. The first numbers 10W and 5W are referring to viscosity at cold so that the lower the number is the thinner the oil is at cold and vice versa.

Which is better 5w30 or 10w40?

The difference is in the viscosity of each at different temperatures. … The 5w30 oil will flow better at low temperatures than the 10w40 oil. This means that the 5w30 oil will protect the engine better at low temperatures, usually when the engine is just starting or during weather conditions such as winter.

What happens if you put 10w 40 instead of 5w 40?

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.

Will using 10w 40 an on engine that is asking for 5w-30 negatively affect my engine if yes in what ways?

With that said, there is very little chance that using 10w40 in your vehicle that specifies 5w30 is going to produce noticeable negative results. If you read your service manual it may even recommend 10w40 for excessively hot climates. You may notice more oil pressure and very slightly less fuel economy.

How bad is it to put the wrong oil in your car?

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.

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.

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Will thicker oil damage my engine?

Not only that, but the engine will waste energy pumping the thicker motor oil, reducing fuel economy. Since thicker oils don’t transfer heat as well as thinner oils, operating temperatures will increase, too, possibly leading to accelerated chemical break down and harmful sludge and deposits.

Is 10w40 good for high mileage?

If both 10w30 and 10w40 are acceptable oil options for your car, it’s recommended that you use 10w40 for your car with high mileage. … The thicker oil helps older engines handle higher temperatures and manage wear and tear more efficiently. The thicker oil will reduce wear and tear and extend the life of your engine.

Is Thicker oil better for older engines?

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.

Can you put 5W 40 oil in 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 5W 40 oil better than 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). … However, the main difference between these two engine types is that the 5W40 can work better than 10W40 in very cold places.

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What happens if I put 5W40 instead of 5w30?

Takeaway. If you are racking your brain to choose between 5w30 and 5w40, we recommend you go with 5w30. However, if it is too expensive or not available for use, you can always go with the 5w40, which is just as good and will not cause any damage to the engine parts.

Will it hurt to put 10w30 in a 5w30 engine?

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.

Which oil is thicker 5W 20 or 10W-40?

For 10w40 motor oils, they tend to be a bit thicker than the 5w40 but still, rather thin and tend to work well in lubricating moving parts of engines during startup. The 40 denotes that the oil will be a little thicker as compared to an average oil when exposed to the heat of an engine which is running.

What’s the best motor oil for high mileage?

  1. Valvoline High Mileage with MaxLife Technology Synthetic Blend Motor Oil.
  2. Pennzoil High Mileage Motor Oil.
  3. Slick 50 Recharged High Mileage Treatment.
  4. Gumout Fuel System Cleaner.
  5. Royal Purple High Mileage Synthetic.
  6. Techron Fuel Cleaner.
  7. Mobil Super High Mileage Oil.

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