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School Skier
08-14-2005, 09:19 AM
I have been using Mercury 25-40 oil for inboards since I bought our MC in 97. If I go to Pennzoil 15-40 marine oil will it have any effect on the engine performance or operation? Both are the same price per quart.

bigmac
08-14-2005, 09:22 AM
I have been using Mercury 25-40 oil for inboards since I bought our MC in 97. If I go to Pennzoil 15-40 marine oil will it have any effect on the engine performance or operation? Both are the same price per quart.

No. Oil is oil. Just make sure it meets the API specs called for by the engine manufacturer and it doesn't matter what brand you use, or if you mix it.

6ballsisall
08-14-2005, 10:00 AM
You'll be a-ok doing what you want to do