SL2014-587/JAP Cylinder Lubrication Update HOT!

Adjusting the ACC factor in service.
For engines where the feed rate ACC factor has already been established and confirmed, new cylinder oils with a different BN level can be used to change the feed rate ACC factor by multiplying the present feed rate ACC factor by the fraction of the BN in the present and the new cylinder oil. Afterwards, the new setting has to be confirmed, either by a feed rate sweep and/or a conventional drip oil analysis.

The individual feed rate ACC factor must be evaluated for each engine using drip oil analysis and frequent scavenge port inspections. There are many options for this evaluation, but common to them all is the fact that they cannot stand alone. Feed rate sweeps have to be followed by monthly drip oil sampling and/or scavenge port inspections, in order to assure that the engine is performing as expected.