Engine oil PENNZOIL or IDEMITSU

I use pennzoil euro spec, I only go through about a quart between 5k oil changes.

I've been alternating between the OE Castrol (with the free maintenance) and Pennzoil Ultra Euro 5W-40 (502 compliant and recognized/certified by Audi/VW) in 5,000 mile intervals. I've had both tested, and the TBN is higher on the Pennzoil and the viscosity always perfect (Castrol tends to read thinner than 5w-40 on the samples I've sent in for analysis).

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 use 0W-20 Pennzoil Platinum for our 2013 Accord Sport.

My car runs full synthetic, no additives. I find a 2.0 engine oil filter mount swap(from cartridge to screw on), royal purple filter, and penzoil ultra/platinum are an amazing combination.

I use Pennzoil Ultra 5W-40 European formula in both of my GTI's and use only oem filters (which are very good btw).

That is my personal favorite so far. Use or burn less than anything else I have tried, and I swear the engine sounds quieter. Previously used Castrol, Amsoil, Mobil 1.

I just picked up some Penzoil synthetic 5w-40 today and right on the front of the bottle it says "Meets BMW and Mercedes requirements" a little search on back label listed all the specs and all VW specs listed above are on the back of the bottle.