2.4 JTDm engine oil: Latest advice from Selenia
Out of interest I checked Selenia's Lube Recommender for their recommended engine oil for the 2.4 JTDm engine in my 159. Surprisingly it now recommends their new generation Selenia WR Pure Energy 5W-30 oil, which is a fully synthetic ACEA C2 low ash specification oil.
There's been a lot of confusion and debate online about the Alfa Romeo owner's manual recommending Selenia WR 5W-40, which is an ACEA A3/B4 specification oil as this particular specification isn't usually recommended for diesel engines with DPF's.
I decided to email technical support at Petronas (owner of Selenia) and this is their response:
The engine of his car was born with SELENIA WR 5W-40 that is the product indicated on the manual.
Then FCA engines 2.4 JTD EURO 5 has developed the lubricant SELENIA WR P.E. 5W-30 this product improves the fuel economy.
However you can use both products.
Hoping to have them clear the doubts remain at your disposal for any further information.
Technical Support Advisor
Technical Service Italy
PETRONAS LUBRICANTS ITALY S.p.A[/i]