Re: Which Engine Oil?

Posted by Joe D'Agostino On 2018/8/22 11:12:19
Thank you. I don't think anyone is suggesting that we use a non modified low viscosity oil.

Both synthetic and mineral oils are modified to provide fluidity at lower temperatures.

A 10W-30 multi-grade mineral based oil is made from a 10 grade oil and has VI improvers added to thicken the product in a 212 F engine. It acts as a 30 grade oil when hot

A 10W-30 synthetic oil is based on a 30 grade oil. This is unlike the counterpart mineral oil based on a 10 grade oil. There is no VI improver needed. The oil is already correct for the normal operating temperature of 212 F.

A main advantage that the synthetic has over the mineral based oil is the ability to lubricate at startup. Both types of oil have the same specifications at 104 F and 212 F

The manufacturers say that synthetic oils are more stable in a hot engine

I am not using synthetic yet. Just trying to understand the benefits and potential pitfalls

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