On Sat, 09 Oct 2004 05:54:19 GMT, WaIIy
wrote:
~~ snippage ~~
I appreciate you thoughts and agree, it's just that I don;t have
definitive information on exactly what Mercury recommends for what
temperature.
Ps for some other posters, my engines are FWC.
I don't mean to be offensive here, but you have the basis for making a
solid decision on this.
Right from the Mercury web site:
What type of oil should I use? Can I use synthetic oil?
To help obtain optimum engine performance and to provide maximum
protection, we recommend the use of Mercury Precision 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 Mercury Precision 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 table below is a guide to crankcase oil selection. The oil filter
should always be changed with the engine oil.
AIR TEMPERATURE
Oil Type
All Temperatures
Mercury Precision 4-Cycle 25W-40 Marine Engine Oil
Below 32? F (0? C)
SAE 20W
32-50? F (0-10? C)
SAE 30W
Above 50? F (10? C)
SAE 40W
This 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.
Hope that helps.
Later,
Tom
"Beware the one legged man in a butt
kicking contest - he is there for a
reason."
Wun Hung Lo - date unknown
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