For those unsure about LM quality, LM brand oils were voted the best by readers of 3 independent auto magazines in Germany. The review contained Castrol, Mobil, and Shell. 5+ million readers took part in the voting.
Read more here.
For last 2+ years, I put LM 10w40 in my car and run happy for 8-10k kms, recently having opened the engine and no visible oil sludge issues. I am well happy with LM and highly recommend it.