Engine oil LIQUI MOLY or Castrol

I buy Liqui Moly 6200 from germanparts.ca for about $70/5L. Our Tiguan consumes a lot of oil sadly, so I buy a lot of it. My mechanic recently recommended using Liquid Moly 2331 (Leichtlauf) 5W40 to see if it helps with oil consumption, and have had that in for the last month or so.

Liqui Moly 0W-20 LR for my F-Type-R. Doesn't use much oil, so cost is somewhat irrelevant.

Had an E63 that I recently traded with almost 200K miles, a few months ago I scoped my 1 and 5 cylinders and they had what I would consider normal to no wear. So as a DIY'r, here are my observations, This is a bigger issue in the States than it is in Europe. ... Keeping the engine clean is key. Frequent oil changes no more than 5k mi, using quality oil and fleece filters, formerly a Mobil 1 guy, now using LiquiMoly.

I'm a Castrol syntec guy and I like Kirkland oil. So that's what my cars get.

I'm personally running Castrol in the BMW bottle.

Got some numbers for the oil pressure Water temp around 90-95C/194F. Ambient temp 28C/82F Oil 5W30 Castrol Edge LL Hot idle 20 PSI 2000RPM 60 PSI 3-5000RPM 70 PSI Looks okay?

My co workers wife had a high mileage Sienna 3.0. Oil leaking from every seal. We started using Castrol high mileage, it stopped leaving spots in his driveway and quit loosing 1.5 qrts between oil changes.

I have stuck with manufacturers till manufacturers recommendation is causing issue, like my gixxer leaked entire oil from companies estar engine oil, switched to castrol power 1, no leak, headache gone and happy riding on it for about a decade now.

Whatever weight the owner's manual says it takes, I'd use that. You'll definitely want to go with a high quality oil though. I personally use Liqui-moly... I have 192,000 on my 2012 A6, and she's still purring right along, a lot of which in my opinion has to do with the higher end oil.

The 2.0 liter gas/petrol engine is the weak link here, due mainly to poor piston ring design. We are third owners of a '14 A4 6MT, purchased in mid '17 with 48K miles. We're at 98K miles now, and with 5K engine oil changes using Liqui Moly or Elf/Total fully synthetic, we use a small nominal amount of engine oil between changes.