Check the quality of your engine oils......

[Downunder]

An interesting PDF from the API (American Petroleum Institute)

 

http://www.api.org/~/media/files/certification/engine-oil-diesel/publications/mom_guide_english_2013.pdf

 

Petrol engine, latest spec is "SN" and for Diesels "CJ-4".

 

DU

 

 

[facthunter]

It's a complex subject . Stick to your engine maker's recommendations and check the local products compliance. Having the drive oiled by the same oil makes a difference. Nev