PFI has pretty much resolved fuel dilution issues from the carbureted days, we are now back full circle. Maybe not as bad as flooding the engine during a cold start, but still, some engines are bad.
This thread has mainly focused on film thickness and wear associated when that thickness fails due to fuel.
However, since fuel is a good detergent, I do wonder its effect on the anti wear sacrificial layer from oil additives. Does fuel strip that layer down? Makes it harder to form?
So perhaps an argument can be made that if the MOFT has not been affected, we shouldn’t worry about fuel dilution, but if the antiwear additive layer is affected by fuel contamination, then the boundary wear protection could be compromised.
And we all know new engines operate in boundary conditions a lot more than the older engines, even when MOFT is still good.
This thread has mainly focused on film thickness and wear associated when that thickness fails due to fuel.
However, since fuel is a good detergent, I do wonder its effect on the anti wear sacrificial layer from oil additives. Does fuel strip that layer down? Makes it harder to form?
So perhaps an argument can be made that if the MOFT has not been affected, we shouldn’t worry about fuel dilution, but if the antiwear additive layer is affected by fuel contamination, then the boundary wear protection could be compromised.
And we all know new engines operate in boundary conditions a lot more than the older engines, even when MOFT is still good.