Originally Posted By: Maximus1966
Originally Posted By: NHHEMI
Fuel dillution is a common issue with outboards....The outboard specific oils are designed with these conditions in mind and they are formulated to combat it...
Fuel dilution does occur occasionally in four-stroke outboards, but is far from common. Unfortunately, there is no way that a motor oil can "combat" this condition. Marine-specific is a marketing ploy, pure and simple and many of them are simply re-labeled common motor oils. The only way to "combat" the fuel dilution problem is to operate your outboard properly and change the oil frequently.
Maybe down in GA where it is warm during the time you run the OB it is not so common but up here in NH during the winter it is very common for the reasons I explained earlier. I operate my OB properly thanks. I am not sure exactly how marine oils combat fuel dillution( I assume betetr additives to deal with it )but they claim to so maybe I am being taken by the marketing folks? I do know they contain corrosion inhiibitors and anti foaming agents that regular oils do not have or at least the marine oils have them to a higher level.
From NMMA on the FC-W standard...
Quote:
Working with the NMMA, industry leaders in lubrication technology developed testing criteria for this marine four-stroke oil. These criteria include bench tests for viscosity, corrosion, filter plugging, foaming and aeration. In addition, the oil must successfully pass a 100-hour general performance engine test.