I am sorry if I am placing a basic question but I am a bit confused about the API specification that I should look for when choosing the right oil
for my Yanmar
. First of all, I have the printed User Manual in the boat and I am writing at home. I had a pdf file in my PC which (until few hours ago) I thought it was the exact copy of the original manual that came with the boat. At the moment of writing I have 3 slightly different User Manuals
on my PC. The Engine Oil
Specifications appear in:
- page 47 out of 168 in one pdf (YANMAR JH Series Operation Manual) which I assume is an older version.
-page 43 out of 164 in a second pdf (YANMAR JH Series Operation Manual @ 2009 Yanmar Marine
- page 45 out of 168 in a third pdf (YANMAR JH Series Operation Manual @ 2009 Yanmar Marine
In addition I also have a Service
Manual where the Engine Oil Specifications appear in:
- page 61 out of 380 (YANMAR JH Series Service
Manual @ 2009 Yanmar Marine International)
In all the 4 documents the SAE viscosity is said to be 10W30 or 15W40. I am using 15W40. On the API classification, the old manual refers that I could use class CF. A large number of oils that I see in shops, have this classification. As I assume that CF-4 and CI-4 are better, I have discarded "CF oils". Where I live, CF-4 is difficult to find, but I can get some. However, I only could get CI-4 by ordering through the WEB. I have 2 bottles of CI-4 and I am OK for the next 500 hours. However, in future and in a remote
cruising area, should I bother to get CI-4 or should I just go with the "more available" CF-4?
Thanks in advance for any comment. Regards, Vladis