Engine oil Castrol or MOTUL

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