Oil and it's additive package protect your engine. The use of analysis to extend oil changes could save some money, on oil, but at what cost. Many pleasure boat owners don't make 100 hours. Today not so much.ġ00 hours is to soon, I would say so. In '92 the two cycle product was still popular in transit, marine and some construction sectors.

Some where around '92, Roger Penske, Detroit Diesels President, made some changes to the standards guiding two cycle oil formulas.

That is not likely a good idea for two cycle engines, for one the two cycle oil technology is likely at a stand still, no oil manufacturer is in a rush to cater to the needs of an engine design representing a small part of the market. In many applications today services happen beyond 500 hours. Most commercial applications, including marine, call for 250 hours. My questions are:ġ) Assuming I could put many many hours on in a year (say a trip to Alaska, many hundreds of hours) - how many hours should I be looking for between changes? I cannot find anything here on SamsĢ) Has anyone opted going the oil analysis route instead of always changing oil? ie checking the additives / contaminants and changing when needed as opposed to just every X interval?ģ) If I was to go oil analysis route and only change it when the sample was getting out of whack, should I just changed the filter when its determined I need to change the oil or change it at a more frequent interval? I have not seen how many hours between changes, although obviously most of us casual cruisers end up just changing every year. I just changed out our oil on our mains and genset and this got me thinking. I am aware there is an increased potential for oil contamination if you run really slow for long periods ( not necessarily going to happen but theoretically could)

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