Quick Answer: Is 5w30 Or 5w40 Better For Summer?

Can you use 5w40 in the summer?

Be happy; 5W40 is great for summer with the added bennie of great cold start specs.

As to interval, you can safely go longer but how much longer will depend on the soot load and fuel dilution.

My oil analysis has shown it takes about 5.5K miles for the soot to get up to 0.4-0.6 percent..

Will 5w30 hurt a 5w40 engine?

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.

What oil is thicker 5w30 or 5w40?

Viscosity The working viscosity of 5w30 is basically from 9.3 to 12.5mm2/s whereas the operating viscosity of 5w40 is 12.5 to 16.3mm2/s. That means 5w40 has larger viscosity than 5w30.

Can I use 10w 40 instead of 5w40?

10w40 is thicker than 5w40, ONLY when cold. At operating temperature it is exactly the same. … Multi-viscosity oils with a lower W number are specifically designed to flow better, and thus lubricate better, at very low temperatures. There is no need to use a 5w-40 if the vehicle only requires 10w-40.

Is 5w30 good for old cars?

In general thinner oils flow faster and lubricate better, and keep the engine parts cooler. using a thicker oil is asking for trouble. So if your original specification calls for 5W30, I wouldn’t change it. … It protects the engine due to lower levels of friction.

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.

What is the best 5w40 synthetic oil?

Best 5w40 Synthetic Oils – Quick Look on Our Top Picks Pentosin 8042206 Pento High Performance II 5W-40… Shell Rotella T6 Full Synthetic Heavy Duty Engine… Liqui Moly 2041 Premium 5W-40 Synthetic Motor Oil… Pentosin 8042206 Pento High Performance II 5W-40…

Is 5w40 good for winter?

The choice between 5w40 motor oil and an alternative like 10w40 depends on the winter temperature in your region. 5w40 is better for starting your engine at low temperatures as it flows more easily at these temperatures.

Which oil is best for high mileage?

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.

What happens if I use 10w 30 instead of 5w 30?

Your oil is a little thicker when cold. No damage will happen. … The 5W and 10W defines how the oil will flow at 0 degrees. At operating temperature, there will be a completely insignificant difference between the two.

Can I use 5w40 instead of 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 temperatures of 50°C, as opposed to 30°C.

Is 5w30 good for summer?

5w30 is a great multigrade oil for use in low starting temperatures as well as high summer temperatures. It is also more fuel efficient since it creates less drag on the bearings and moving engine parts. 10w30 is thicker and may provide better sealing capability for older engines.

What oil is best for summer driving?

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.

What is 20w50 oil used for?

SAE 20w-50 Oil – Conventional & High Mileage A SAE 20W-50 motor oil is typically used in older vehicles or in particularly warm climates. Castrol GTX 20W-50 has been specially formulated to help extend the life of your engine by keeping it free from sludge, even when operating in extremely high temperatures.

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.

What oil is better for hot weather?

A 30 grade oil, thick enough to protect in the heat, was recommended for summer use. Then, multi-grade oils were formulated. A 10W-30 had the winter cold start flow properties of a 10W and the summer, high-temperature thickness of a 30 grade.

What is 5w 40 oil used for?

Ideal for starting engines at low temperatures and effective at high engine temperatures, 5w40 engine oils can be used in most conditions.

Does thicker oil run cooler?

If it makes you feel safer, run a bit thicker oil but with thicker oil, comes increased engine wear at cooler temperatures and increased heat into the oil through more friction and less flow (flow and pressure are inverse , as you increase pressure, you decrease flow).

Is 10w40 good for summer?

However, if you live in warmer or hotter regions, you’d definitely want to grab the 10W40 engine oil. This is especially important during hot summer days when the scorching heat of the sun can really amplify the heat generated by your engine.

Can I run 5w40 in my Cummins?

Registered. There is no downside to running 5w-40. It is not “thinner” oil. It is thinner at cold temps, but it’s viscosity cold is still much higher than when hot.

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.