I've been using liqui moly for a while now and its been great.
Reviews of LIQUI MOLY parts For Business
Germany
As to which one, the two that are reported to induce the *least* consumption are Liqui Moly Leichtlauf, and Fuchs Titan Super Syn.
Liquid Molly 5W-40 is what I use in mine.
I just put a can in my old mustang engine and it’s never felt so tight and smooth. Definitely good for older engines!
I run liquimoly and it has been great in every vehicle I've put it in. I run WIX XP filters. All my engines run beautifully. My ram 1500 tows frequent and gets ran harder than most.
I poured in the whole bottle when changing fuel filters recently, and the engine seemed to run quieter with better fuel efficiency right afterward.
My 2019 consumed maybe 1/2qt for the first two oil changes. Swapped to Liqui Moly last 2 changes and been zero oil consumption.
my personal analysis’ on my s54 over the past 7 years using LM 10/60 have all been perfectly fine with low wear numbers.
I've used both and have put over 50,000 miles on my B46 (b48) without any issues. I think the liqui moly might be a little quieter, but otherwise no difference I can find. I would not put a heavier oil than the engine was designed for. These engines are a little noisy IMO but that doesn't mean anything is wrong. I actually think mine is quieter now at 88,000 then when I bought it at 34,000.
Liqui Moly 0w20 6200 is what I run and a factory filter
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