Question: Is 10w30 Better Than 5w30?

Should I use 10w30 or 5w30?

This oil is also the better of the two types for the old engines and also for those that use special fuel like biodiesel engines.

With the greater sealing capability, 10W30 will be more effective at protecting the older engines than 5W30..

Is 5w30 or 10w30 better for winter?

At operating temperatures, both oils will have the same viscosity (30) and will flow and protect identically. If the oil will be in the engine during winter and you live in a place where it gets cold during these months, use 5w30 oil. If it will only be in the engine during the summer, use 10w30.

What happens if I put 10w30 instead of 5w30?

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.

Is it bad to mix 5w30 with 10w30?

Mixing different oils will not improve the performance or efficiency of the engine in any way. The additives in synthetic oil may have limited or no effect at all when mixed with a regular engine oil. … 5w30 and 10w30 are both 30 weight oils and the exact same thickness in your engine when it is at operating temperature.

Should I use thicker oil in a high mileage 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.

Are oil additives bad for your engine?

The researchers discovered what was already suspected, that the additive ZDDP (zinc dialkyldithiophosphate) does indeed reduce engine wear. Unfortunately, it also increases friction and can degrade the life of catalytic converters. Additionally, it does not work for engines made of any material other than steel.

What is the best high mileage oil?

Valvoline High Mileage with MaxLife Technology. … Castrol Edge High Mileage. … Mobil 1 High Mileage. … AmazonBasics High Mileage Motor Oil. … Pennzoil High Mileage Motor Oil. … Lucas Oil High Mileage Oil Stabilizer. … Royal Purple HMX High Mileage Synthetic Motor Oil.

Should I 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.

Will thinner oils damage your engine?

If you use a viscosity that’s one grade higher or lower than what’s recommended for your engine, it’s unlikely you’ll do any lasting harm. But, to alleviate any concerns about engine protection and your vehicle warranty, it’s best to use the viscosity recommended in your owner’s manual.

Is 5w30 good for high mileage?

You will be just fine with regular 5W-30 that high mileage isn’t going to make your engine last any longer. If you are concerned about wear or if you oil pressure is lower increase to 10W-30 that will do more than high mileage oil ever will.

Is synthetic oil bad for old engines?

Using synthetic oils in older models The synthetic oil could leak out and the vehicle could burn or lose oil. … Because synthetic oil does a better job of cleaning out sludge, it could remove deposits that are acting as seals. It’s not accurate to say that you should never use a synthetic oil in an older car.

Is 10w30 better for high mileage?

Both high mileage 5w30 and 10w30 engine oils have the same additives, the only difference is the viscosity at cold startups. Since both oils have the same operating temperature viscosity (30) and additives, they will perform exactly the same. However, 5w30 flows much better than 10w30 during cold starts.

Do you use thicker oil in winter?

Thin oils that are less prone to thickening in low temperatures will help you start your engine more quickly in winter while thick oils that are less prone to thinning in hot temperatures will help your engine perform better in summer.

Can you switch from 5w30 to 10w30?

The oils only differ in cold weather viscosity. If you never see temperatures below zero F then either 5W30 or 10W30 is fine. … You don’t really need to change to the 10W30. The 5W and 10W are the numbers that tell you the low temperature behavior of the oil and the second number tells you the high temperature behavior.

What oil is best for old engines?

synthetic oilsFull synthetic oils are always a good choice for older vehicles that have been used a lot. They are perfect for lubricating motor parts as they do it much better than any other oil.