Castrol EDGE Euro is also VW 508 spec.
I just use LiquiMoly 0W-20 with the VW spec
The mechanic is absolutely wrong. You must use a 5W-40 C3 oil with the Fiat 9.55535-S2 specification, I use the Castrol Magnatec 5W-40 C3, which is cheap and easy to find, but any other brand with the correct specification is fine. A 0W-20 oil has insufficient pressure and film strength, and will lead to damage over time.
Liqui moly solved lifter noise on my old Kadett.
Liqui Moly Molygen 5w-40
I have a 450k km 1.9 tdi, and a 300k km 1.6 tdi, i always use 5w30 castrol, no issue.
I recently changed the engine and transmission oil in my car and opted for Liqui Moly, as from what I researched it withstands higher temperatures compared to the OEM.
I would only suggest using \"premium\" oil brands, like Castrol or Elf, in correct specification.
I did an oil change with liquimolly 5w-40 and added liquimolly lifter additive, and drove it for a week hoping it would go away.
Start by getting rid of that junk liqui moly and replace it with ROWE RS 5w40 (i can link many kits if need be)
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If choosing engine oil across many manufacturers, check the part ranking. If your choice is down to two brands, the PartReview part comparisons help.
We compare engine oil across these categories:
In March 2026 on PartReview, engine oil LIQUI MOLY were overall better than Castrol.
Engine oil LIQUI MOLY and Castrol were equally popular according to data in March 2026.
By vote balance, engine oil LIQUI MOLY surpassed Castrol:
By number of reviews, engine oil Castrol surpassed LIQUI MOLY:
In March 2026, according to PartReview, engine oil LIQUI MOLY led more car-specific ratings than Castrol:
LIQUI MOLY are chosen by owners of cars such as: Audi A4, Porsche Cayenne, Volkswagen Golf, Audi A3, Audi S4, Audi S5, Audi SQ5, Volkswagen Tiguan, and others.
Castrol are chosen by owners of cars such as: Skoda Octavia, Audi A6, Audi A7, Audi TT RS, Ford Explorer, Volkswagen Beetle, Volkswagen Corrado, and others.
If this comparison didn’t fully answer your question, there are many others on PartReview.
For example, comparisons of engine oil LIQUI MOLY with: Mobil, MOTUL, Shell, AMSOIL, VALVOLINE, PENNZOIL, RED LINE, OEM Toyota, Mannol, RAVENOL.
Also available: comparisons of engine oil Castrol with: Mobil, MOTUL, Shell, AMSOIL, VALVOLINE, PENNZOIL, RED LINE, OEM Toyota, Mannol, RAVENOL.
You can also see who is better among other engine oil manufacturers: Mobil or Castrol, Mobil or LIQUI MOLY, Mobil or MOTUL, Mobil or Shell, Mobil or AMSOIL.
