Menu Close

Can I use synthetic oil to break in a rebuilt engine?

Can I use synthetic oil to break in a rebuilt engine?

Synthetic oils do not damage engine seals in an engine of any age. In a rebuilt engine, a certain amount of controlled wear can be expected to occur to allow piston rings to “seat” and the engine to “break in.” Synthetic oil may be used for the “break-in” period and throughout the life of the engine.

Can I use fully synthetic oil instead of semi?

There are some vehicles that require semi synthetic oil to be used – however, fully synthetic oil could be used instead as it could benefit the protection and performance of the car.

What oil is best for a new engine?

Some people prefer to use a SAE 30 non-detergent motor oil to break in a newly built engine. Others use a conventional 15W-40 diesel oil because it contains a higher level of ZDDP than motor oils for gasoline engines.

What is the best oil to break in a motor?

Use a 5w-30 or 10w-30 motor oil with an engine break-in additive (ZDDP or zinc camshaft additive), especially with flat tappet camshafts.

What happens if I use semi synthetic oil instead of fully synthetic?

If you do use semi-synthetic engine oil instead of fully synthetic oil then it is unlikely to cause any drastic or immediate problems. However semi-synthetic oil will not offer your engine the same levels of protection to your engine that fully synthetic oil does and may result in reduced engine performance.

When to switch from conventional to synthetic oil?

For the first oil and filter change, switch from conventional to conventional/synthetic blend. Continue with synthetic/conventional blend for at least two other oil changes. Always replace the oil filter anytime you change engine oil. On the third oil change, switch from the conventional/synthetic blend to full synthetic.

Can you use synthetic motor oil in a car?

Although most of today’s new cars, trucks and SUV’s have synthetic motor oil inside their engines, there are still a few that utilize conventional motor oil as their primary source of lubrication.

How often do you change the oil in your car?

For example, a person might change his or her oil every 3,000 miles with regular oil and only every 5,000 miles with synthetic oil. When synthetic oil was originally developed it was meant to be used only in engines engineered to be specifically compatible with it.

What was the original purpose of synthetic oil?

When synthetic oil was originally developed it was meant to be used only in engines engineered to be specifically compatible with it. Older synthetic oils used esters, which are chemical compounds mixed with alcohol, and were harder on the components, including engine seals and gaskets.