Unfortunately, I don't agree your comments..

First, the so called 'Synthetic' oils on the market today are mostly not synthetic at all. Most of them are only group 3 petroleum-based oils. Only difference between those oils and the regular motor oils is that group 3 oil is highly refined. So the oil properties are very consistent. But they are still petroleum oils.

Second, the engine discused here consumes motor oil at high speed. A real synthetic oil should perform better in extreame conditions than the regular oils. I don't understand why the synthetic oil will cause high oil comsumption at high speed.

The truth is, the new engine oil is a low quality fake 'synthetic' oil. It can not hold the oil property at high temperature. The oil becomes too thin under this condition. That is how the problem happened.

Mobil 1 Synthetic 5w30 and 10W30 are the examples of fake synthtic oils that failed the viscosity requirement at high temperatures.

Use one of the following oils to your car to see if the condition improves:

Mobil Synthetic High mileage 10W30
Castrol Synthtic 0W30 European formula
Motorcraft Synthetic Blend 5W30
Kendall Synthetic 5W30 with titanium

Or just switch back to your regular motor oils used before.

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• I think I used Mobil 1 synthetic, will try your suggestion, than -tjzsm1- ♂ (0 bytes) () 11/16/2010 postreply 20:39:35