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Joined: Sep 2011
Posts: 60,646
Campfire Kahuna
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OP
Campfire Kahuna
Joined: Sep 2011
Posts: 60,646 |
Our Mercury 20 horse seems to call for 25W40 oil. Should I go ahead and buy from a Merc dealer?
These premises insured by a Sheltie in Training ,--- and Cooey.o
"May the Good Lord take a likin' to you"
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Joined: Dec 2010
Posts: 2,204
Campfire Regular
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Campfire Regular
Joined: Dec 2010
Posts: 2,204 |
The short answer is yes. Beyond that, marine oils don't have to worry about meeting specs that automotive engine oils need to meet, specifically lower anti-wear properties needed to protect catalytic converters. So marine oil can be more made more robust than automotive oils. Also, because of the obvious water environment, marine oils are typically formulated with more rust inhibitors. Here's a short write up on the new Mercury oils - Click Here
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Joined: Mar 2005
Posts: 5,113
Campfire Tracker
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Campfire Tracker
Joined: Mar 2005
Posts: 5,113 |
Walmart carries the oil here, it’s $10 a quart.
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Joined: Sep 2013
Posts: 5,866
Campfire Tracker
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Campfire Tracker
Joined: Sep 2013
Posts: 5,866 |
Or you could run 15w40 diesel oil in it. Tons of people use rotella or delo in 4 stroke outboards and motorcycles. Costs WAY less, works just as good. Cold weather starting will be better with a 15w oil. Diesel oil has all the additives that they took out of car oils like zink and phosphorus and that's good for engines that are under a load like outboard or engines that share a sump with the transmission like motorcycles.
Eating fried chicken and watermelon since 1972.
You tell me how I ought to be, yet you don't even know your own sexuality,, the philosopher,,, you know so much about nothing at all. Chuck Schuldiner
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