Engine oil IDEMITSU or FUCHS

My experience with oil consumption - 5W30 VW - First oil used by me in this car - 2000km - 200 ml added 5W40 Fuchs Titan Race Pro S - Now in the engine - 1000km - Same level as it was at the revision

Subaru OEM oil is Idemitsu 0W-20. I currently use Idemitsu Zepro\* 0W-20, a high-moly formulation from the same manufacturer.

That's the wrong oil. You want the Idemitsu eco gold medalist advanced moly 0w-20, which is basically the same as Mazda oil(Idemitsu makes the mazda oil).

Idemitsu zepro eco medalist advanced moly 0w-20. Basically the same thing as Mazda's oil.

Fuchs Silkolene. Good stuff.

My 15 S4 has seen 3 oils in <10k miles. The factory fill was Fuchs. Dealer first change was PP Euro and my latest change the other week was with M1. I've run M1 0w40 Euro in my B5 forever and have had 0 issues with it. Saw no reason to not continue running it in the B8.

Dark oil is actually a good thing believe it or not. It means that the oil is doing it's job and holding all the contaminants in suspension. In fact if my oil would look clear at the oil change I'd be very concerned and most probably change the brand.

You don't need to add any more additives to modern day oils. You said you will be using Mazda 0W-20 oil? This is one of the best 0W-20 oils on the market. It is made by Idemitsu for Mazda. It has very high Viscosity Index of 221. Most 0W-20 oils are around 170. This means it is one of the lightest 0W-20 at start up. This is what you want in the winter.

i changed mine @62k miles with similar results. i to change my oil around 5k and was useing m1 0w-40, but just recently started useing fuchs titan oils.