"Billgran" wrote in message
. ..



"Larry W4CSC" wrote in message

One of the REQUIREMENTS of this ultra-sophisticated piece of American
ingenuity is its NMMA-certified FCW SAE 25W-40 motor oil.


"NOYB" wrote in message
...
My Suzuki recommends good ol' 10W-40. I just changed my oil and replaced
it with Semi-synthetic.




Go to a library or find a a back issue of the March 2004 Trailer Boats
Magazine. They reported on and lab tested both specialty 4-stroke
outboard oils against ordinary car oils, including Mobil 1. The results
were suprising..


Can you provide a brief summary of their conclusions?