High mileage oil is recommended for vehicles with 60,000 or more miles. As the engine cools, regular oil precipitates to the bottom of the engine pan until the engine is turned on again. That means that on a cold start, there is very little lubrication on the cylinder walls for a few seconds. High mileage oil will leave a small film on the cylinder walls to keep them lubricated even if the engine is cold.
Synthetic oil is less oil and more liquid plastic. Because this lab-produced oil has longer molecular chains, it stays slippery longer and provides better protection for more miles, about 5-7,000 miles instead of the regular 3,000. Synthetic oil is also more resistant to extreme temperatures, and won’t harden at high temperature, nor “gel” at low winter temperatures.
Some vehicles, such as hybrids and newer luxury vehicles require synthetic oil.
As always, if you have any questions about the difference in oils or what your vehicle should take, give us a call or stop in today!