Engine oil LIQUI MOLY or ELF

LIQUI MOLY Engine oil

Liquimoly leichtlauf 5w40. Been told it’s a bit better than 5w30 in a 20+ year old engine due to being a bit thicker. Also does better at higher temps and I drive like a dick

Pros: better at higher temps
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LIQUI MOLY Engine oil

Liqui Moly leichtlauf hightech 5w40. Because it matches the BMW LL-01 specification and was formulated to help with the sticky piston rings issue common to many german engines. Noticed lower oil temp under load and a gradual reduction of oil consumption

Pros: lower oil temp, reduced consumption
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LIQUI MOLY Engine oil

Ughh. How did I miss that! I thought I was just saving $5 a liter for the same thing. I am so annoyed with myself. :banghead: I just pulled up the specs for both and indeed the Synthoil has a viscosity index of 171 vs 180 for the Leichtlauf. Also the NOACK for Synthoil is 12.9% vs 10.0% for Leichtlauf. From what I can tell the 12.9% NOACK of Synthoil is what doesn't allow it to have the VW 502 00 approval.

Pros: lower NOACK
Cons: lower viscosity index
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