I have a DI Honda with a fuel dilution (>5%) of engine oil issue. Without getting into the "why" this occurs my question is what's the harm?
From what I've gathered, the primary problem with fuel dilution is reduced oil viscosity that in turn may reduce the thickness of the oil wedge protecting bearings and the like. If this is the case, going up a grade in viscosity (e.g. 0w-20 to 0w-30 or a blend of the two) would keep even badly diluted oil firmly in the OEM-spec'd 20 weight grade. But is this the end of the issue? Obviously, oil is a better lubricant than gasoline but do gas concentrations of 5% or so compromise lubricity enough to remain a problem even if the viscosity is OK?
Appreciate any thoughts.
From what I've gathered, the primary problem with fuel dilution is reduced oil viscosity that in turn may reduce the thickness of the oil wedge protecting bearings and the like. If this is the case, going up a grade in viscosity (e.g. 0w-20 to 0w-30 or a blend of the two) would keep even badly diluted oil firmly in the OEM-spec'd 20 weight grade. But is this the end of the issue? Obviously, oil is a better lubricant than gasoline but do gas concentrations of 5% or so compromise lubricity enough to remain a problem even if the viscosity is OK?
Appreciate any thoughts.