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July 29, 2015 at 4:50 pm
#21162
Mercury Bulletin Number 80-6:
"A. USE OF FORMULA 50-D OIL IN OLDER MERCURY OUTBOARDS
Formula 50-D oil can be recommended (at a 50:1 mixture) for use in earlier Mercury outboards regardless of year of manufacture.
Formula 50-D also can be used in other brand outboards (at a 50:1 mixture), provided that the manufacturer recommends use of a 50:1 oil mixture."
The above was copied verbatim from a Merc Service Bulletins Microfiche.
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