Generically, the generic oil filter works best when attached to the engine and not when immersed in generic saltwater. It should be noted though, that this in no way implies that a generic oil filter will not work when immersed in generic saltwater.
My understanding, and I'm neither a chemistry major nor say, a legal expert (but I did stay at a hotel in the recent past) is that oil and water do not in fact mix.
These quality oil filters on the Tartan might be of such HIGH quality they might be useful in keeping the boat drier if a emergency such as immersion (in part, or in whole, in operation or not) might be survivable with proper insurance and legal assistance. I do not know as I haven't tried it; there being no need on my boat; they (oil filters of high quality) may be useful in preventing blistering, being proof against water intrusion and all.
Properly shaped oil filters are also strong and flex resistant, that could come in handy as a general trait, preventing flex and other bendy toy like problems.
That's not a recommendation, just a thought..
Is it possible to solve shiny oil filter’s problem by installing five filters in a row? In case first filter fails due to salt water immersion the second filter picks the job and so on? It seems like very simple solution. Will Tartan honor its warranty after such boat improvement?
Well, I was so impressed by the quality of the oil filter, that I was thinking it might be a good preventative measure to attach lengths of duct tape to the filter and string the lengths to several attachment points to the rest of the hull. This might possibly minimize unforeseen salt water immersions of that beautiful filter. I wish I had taken a picture of it so I could post it here on sailnet.