Fred,
I run synthetic diesel oil in my Suburban, but not in my Yanmar. The last I read from Yanmar was to continue using conventional oil. I prefer Rotella T 15W-40. Good stuff! Jake From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Fred Hazzard via CnC-List Sent: Monday, May 25, 2015 11:03 AM To: cnc-list@cnc-list.com Cc: Fred Hazzard Subject: Re: Stus-List Darker Smoke, Harder to Start What do the experts say about synthetic oil in diesels? Fred Hazzard S/V Fury C&C 44 Portland, Or On May 25, 2015 7:10 AM, "Marek Dziedzic via CnC-List" <cnc-list@cnc-list.com> wrote: most of the engine oils that are available today have plenty of additives that get bad or ineffective after about 6 month in the engine. So if you are using the engine year round, you might consider changing the oil twice a year (at least once a year) and if you are using it less (even if you use it for just a few hours each year), change it annually. For us, Northern folks, this usually mean changing it in the fall. From what I read around, there are people who change the oil in the fall and again in the spring. I don’t, but I can understand the reasoning behind it. I hate throwing out the good engine oil after some 25-50 h of running time, but this is a cheap insurance for the engine. Marek 1994 C270, Legato Ottawa, on
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