Engine oil LIQUI MOLY or PENNZOIL

I use Liquimoly Molygen (5W-40) and I’m very content.

I had oil burning issues even with 10W-40 in my high mileage 325.\nMy mechanic put in LiquiMoly 10W-60, which seems to be much better.

5w-30. I use LiquiMoly Molygen and my experience is good.

I use it on my 2016 S5 and it’s wonderful. It’s basically the same as Leichtlauf just with the friction modifier and UV capabilities if you need to spot an oil leak (only in the first 300 or so miles because then the oil gets too dirty to work with the UV). I’ve heard the friction modifier works well in older performance cars due to the increased wear of their engines. Yes it’s technically not approved but you won’t go wrong with it.

I use the Leichtlauf High Tech. Really helped my higher mileage SQ5 with chain rattle.

I personally use Liqui Moly. I've tried Castrol, Mobil 1, Amsoil, etc. and my BMW (E85 Z4M) runs noticeably more smooth with the LiquiMoly.

I’ve never had any issues with 5W40 Liqui Moly Leichtlauf.

I run liqui moly molygen 5w 30 oil in mine. Runs ultra quiet and quiets lifter tick. Runs nice and cool and runs like a champ!

I've been using Penzoil ultra platinum full synthetic 0w-20, though it does burn sometimes a quart every oil change.

Pennzoil UP was on a sale and I bought 15 quarts, my Sierra dropped a lifter within 200 miles of the OC and switch, related, no way, will I ever use Pennzoil UP again, no way.