quote:
MerCruiser Gasoline Engine Oil Recommendation
Change
The following crankcase oil recommendation supersedes all previously printed crankcase oil recommendations
for MerCruiser gasoline engines. The reason for this change is to include the newer engine oils that
are now available in the recommendation.
Older owner manuals, service manuals and other publications that are not regularly updated will not be
revised to show this latest engine oil recommendation. Current owners manuals, service manuals and other
service publications that receive regular updates will receive this revised recommendation the next time
they are updated.
Crankcase Oil
To help obtain optimum engine performance and to provide maximum protection, we strongly recommend
the use of Quicksilver 4-Cycle 25W-40 Marine Engine Oil. This oil is a special blend of 25-weight and
40-weight oils for marine engines. If not available, a good grade, straight weight, detergent automotive oil
of correct viscosity, with an API service rating of SH,CF/CF-2 may be used.
In those areas where Quicksilver 4-Cycle 25W-40 Marine Engine Oil or a recommended straight weight
oil is not available, a multi-viscosity 20W-40 or, as a second but less preferable choice, 20W-50, with API
service ratings of SH,CF/CF-2 may be used.
IMPORTANT: The use of non-detergent oils, multi-viscosity oils (other than Quicksilver 25W-40 or
a good quality 20W-40 or 20W-50), synthetic oils, low quality oils or oils that contain solid additives
are specifically not recommended.
The chart below is a guide to crankcase oil selection. The oil filter should always be changed with the engine
oil.