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Re: Oil change interval (machschnell)

Using Castrol 5W50 Syntec, I followed VW recommendations of 15,000 Km (10,000 mile) change intervals, and the VR6 now has 32,000 Km on it. A sample of the oil was extracted after 7,500 Km of use, and again at the 15,000 Km change point, and tested by a professional lab. Both samples showed minimal wear, viscosity change and contamination, and even after 15,000 Km, the recommendation was for continued use and not to change the oil.
This is with about 85% highway use, and you have to factor in your specific driving conditions, but the results speak for themselves. I'll continue to change at the recommended interval and have samples analyzed. The results will be posted. I have switched to LubroMoly 5W40 synthetic, so it will be interesting to see how it compares to the Syntec.
 
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