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GC has a slightly higher flash point 238*C (vs. Mobil 1 230 * C ) and a much better pumpability when cold thus offering a much better protection for my engine (I live in NE). It's also a very stable synthetic motor oil with a cSt of 12(+-) at 100 C which is very important for a turbo engine. A better alternative might be PENNZOIL ULTRA ™ EURO but it's very difficult to find the variety I need.
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