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Hello!! We have two IRN75K air compressors and have always used the specified oil. The oil in question is the IR COOLANT ULTRA (ref.#:92692292). It is very expensive, around 760€ for 25 liters (something like 38$ a quarter). The specs, and believing in the IR information are: I was wondering...

Hello!! I´ve got my first UOA, and as a newbie, I´m sharing the results with the forum hoping to learn a bit more about motor oils. I thank all opinions/contributions in advance. Brand: VW Model: Golf mk4 1.9TDI Year: 2002 Engine: 100HP (ATD Unit-Injector) OEM filters Car mileage: 81033...