That is an extensive analysis for $25. TBN Trending is useful as is trending for wear metals but in large volume systems trending can be complicated by the addition of any new oil added to top up as this is often done without keeping a record of how much oil was added to top up. This type of analysis is very cost effective for large engines that may hold hundreds of gallons of lube oil but not so much for our boats where 3 or 4 L of suitable new oil can be bought for about the cost of analysis. So i change oil in the fall before haul out to check for water and for peace of mind but I only change the filter every second or 3rd year. I figure if the filter is clogged it is probably already too late. I have dissected filters to look for visible debris with not much to report bearing in mind that particles i could see would have to be larger than about 40 microns. The anti oxidant, anti wear and anti corrosion additives and viscosity index improvers are good for very long term use. Water (salt or fresh) and fuel dilution are the most often found contaminants in marine diesel oils.
On Fri, Aug 30, 2019 at 7:05 PM Josh Muckley via CnC-List < cnc-list@cnc-list.com> wrote: > One of the biggest reasons an oil "wears out" is that the acids build up > and the oil's pH is too low. If you know the starting base number you can > track it and predict when it will be "exhausted". I use Amsoil Marine > Diesel Oil 10w40. It has a TBN of 12 and I send samples off to be > analyzed. There are lots of different parameters checked and any one of > them can create call for an oil change. The recommendation comes back from > the lab in about a week and the service costs about $25 including > shipping. This is almost the exact same service that we do on the three > 3.5Mw and two 5 Mw diesel generators where I work. We only change the oil > after a major overhaul. You don't have to use Amsoil to use the analysis > service. As I recall I haven't changed the oil in almost 3 years. > > Here is a copy of my last report. > https://drive.google.com/file/d/1MaBnvf4Fc9auz-p_Yw-yp5uh-Z7R4N__/view?usp=drivesdk > > Josh Muckley > S/V Sea Hawk > 1989 C&C 37+ > Solomons, MD > > > > > On Fri, Aug 30, 2019, 1:47 PM Wade Glew via CnC-List < > cnc-list@cnc-list.com> wrote: > >> Can I ask if I can use Shell Rotella Synthetic diesel oil in my 1986 >> Yanmar 2GM? >> >> Wade >> Oh Boy 33 MK II >> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each >> and every one is greatly appreciated. If you want to support the list - >> use PayPal to send contribution -- https://www.paypal.me/stumurray >> >> > On Fri, Aug 30, 2019, 1:47 PM Wade Glew via CnC-List < > cnc-list@cnc-list.com> wrote: > >> Can I ask if I can use Shell Rotella Synthetic diesel oil in my 1986 >> Yanmar 2GM? >> >> Wade >> Oh Boy 33 MK II >> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each >> and every one is greatly appreciated. If you want to support the list - >> use PayPal to send contribution -- https://www.paypal.me/stumurray >> >> _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > -- Sent from Gmail Mobile
_______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
