Ianh wrote:

The Penrite oil site provides a good insight into the ACEA standards. Including C1 is Sulphated Ash <0.5% , and C3 is Sulphated Ash < 0.8%.

These percentages are small, however in comparison C3 would potentially have 60% more sulphared ash than a C1, which would not be good for a DPF.

https://penriteoil.com.au/knowledge-centre...ations/364

That indeed is very informative

The thing is that the more I read is the more seems like that the C1 protects the dpf and to certain extent the environment more than the engine. And engine failure is not cheap either.

Very confusing. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black

Dinnu wrote:

The thing is that the more I read is the more seems like that the C1 protects the dpf and to certain extent the environment more than the engine. And engine failure is not cheap either.