Can I replace 5W-30 with 10W 30?

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.

What happens if I put 10w40 instead of 5W-30?

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.

What oil should I use for a rebuilt engine?

When breaking in any new or rebuilt engine, we recommend a dedicated Break-In Engine Oil. These are all conventional (mineral-based) oils with higher levels of ZDDP.

What happens if you 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.

What is the difference between 5W and 10W oil?

A 10W or 5W is the index for how easily the oil flows in winter (hence the W). A 10W oil thickens more than a 5W. The other number indicates the oil’s resistance to thinning at high temperatures.

Is 10w30 good for high mileage?

Mobil Clean High Mileage 10W-30 is designed for vehicles with more than 75,000 miles. Its advanced formulation helps protect seals and prolong engine life. These oils protect against sludge and engine rust and corrosion under high and low-temperature operating conditions.

Is it OK to mix 5W and 10W oil?

I often get asked if you can mix 5W-30 with 10W-30. Your engine would prefer that they be of the same formula, but it will not hurt even they are different brands. There is nothing wrong with mixing oils of two different viscosities, but it is not the optimum condition.

Can I put synthetic oil in my car after using regular oil?

Yes. It is possible to use synthetic oil after using regular oil. However, it is important to contact your car manufacturer on whether you can use synthetic oil on the engine. Moving from regular oil to synthetic oil is an upgrade.

Can you put 10W oil in a 5W car?

If they originally recommended 10W-30, they you can use 5W-30 or a mixture. If they originally recommended 5W-30, your mixture will not pump as well at very cold temperatures.