Originally Posted by Tikka
Originally Posted by edyvw
Originally Posted by 390pi
I have a 2015 JGC Ecodiesel.
There was a TSB 18-078-16 that changed the spec from 5w30 to 5w40. The TSB specifically mentions Rotella T6 syn 5w40.
They issued a revision to owners manual for earlier models.
I changed to this @50k miles; @110k miles now, still doesn't use oil.
Note: it takes a little while for the oil to drain out of the filter housing so, expect an extra 20 min or so drain.
Yes, and T6 is band aid to larger issue.
That engine is originally designed around C3 oils as all JTD Fiat engines are after 2004.
T6 s recommended due to accessibility. However, Motul X-Cess 5W40 and Castrol Edge Turbo DIesel 5W40 are similar thickness as T6 but also C3 oils and more DPF friendly.
Hi Edyvw
I will admit that my understanding of lubricating oils is limited but I do find Jeeps' logic baffling.
The 3.0 ecodiesel has bearing issues so they went for a 5w/40 but dropped the c3 specification in favour of a CJ-4 in America. This equates to E9 in Europe I think. E9 in 5w/40 is very difficult to find in UK so Jeep uses a A3/B4 here.
https://extranetpli-eu.pli-petronas.com/dsp/pdf/eng/scat/1092_scat_eng.pdf
I get the impression Jeep sort of thought 'oh crap, what can we use in UK'? Does that make sense?
Why didn't they just go for a C3 5w/40? Any ideas? 5w/40 C3 Oils are plentiful in UK and Europe.
Are they sacrificing DPF life to just find a 'fix' for the bearing issue?
Yeah, they are sacrificing DPF. Basically their thinking is that premature failure of DPF will happen when most people changed vehicle or will think that it is that time. Probably they are going for more Zinc in oil. However, bottom line is that it is engineering issue, and they did not want to address it properly, but put band aid to it and kick the can down the road to consumer. However, owners should know that DPF is expensive toy. If I owned this engine I would make sure to find some really stout C3 5W40 oil. New Motul X-Clean Gen2 looks really stout with excellent HTHS:
https://www.motul.com/us/en-US/products/8100-x-clean-gen2-5w-40