Castrol EDGE Euro is also VW 508 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.
I have a 450k km 1.9 tdi, and a 300k km 1.6 tdi, i always use 5w30 castrol, no issue.
I would only suggest using \"premium\" oil brands, like Castrol or Elf, in correct specification.
Castrol Power1 is really good though
Prolube is trash used motul and my top speed increased by almost 10 on all gears on my d250
I've been running 8100 Power 5w30 for the last two changes, every 3000 miles, and the aced the initial Blackstone test.
I change the oil myself...to ensure it's done correctly and with quality oil (I use Castrol Edge). And I go by the oil minder. I do smell gas during oil changes but it's not strong and never in the cabin between oil changes as some have reported.
I used so many brands
- Motul : okay
Could be the oil and not any problem with the engine itself. In India, these engines come with Motul 7100 full synthetic oil. There have been some discussions on the 390Duke forums and on Reddit that the oil burning issue and high oil consumption is caused by using Motul 7100
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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 Castrol were overall better than MOTUL.
In March 2026 on PartReview, engine oil Castrol were overall more popular than MOTUL.
By vote balance, engine oil Castrol surpassed MOTUL:
By number of reviews, engine oil Castrol surpassed MOTUL:
In March 2026, according to PartReview, engine oil Castrol led more car-specific ratings than MOTUL:
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.
MOTUL are chosen by owners of cars such as: BMW X3, Renault Megane, Audi TT, and others.
If this comparison didn’t fully answer your question, there are many others on PartReview.
For example, comparisons of engine oil Castrol with: Mobil, LIQUI MOLY, Shell, AMSOIL, VALVOLINE, PENNZOIL, RED LINE, OEM Toyota, Mannol, RAVENOL.
Also available: comparisons of engine oil MOTUL with: Mobil, LIQUI MOLY, 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, LIQUI MOLY or Castrol.
