new to the optimax dfi enginge. I have a 2005 mercury racing 250xs. Is the mercury premium plus oil or mercury optimax/dfi oil best suited for my motor? From the manufacturer description, both appear to be for opti/dfi motors
I wasn't looking for an obvious answer. Just trying to understand the mechanical differences of the mercury racing opti and the regular opti. This motor is on a hydrostream voyager which will be carrying my family and will see plenty of slow to mid speeds. I will only be "racing" when they get dropped off at the dock. My point is this, I know this is the best oil for wot operation but is it ok for slow speeds as well. Not sure why bananas are crooked but I do know they don't cost as much as a 250sx.
To my knowledge and friends with merc acing premium plus is what the testing with. It is what they can promise you 100% works. The truth is a top syntetic like Alisysn will work , but stay away from Klotz per a noteworthy builder of race engines and the tear downs he has done.
However, i would run Merc/quiksilver Premium plus as long as it is under warranty just to cover your A$$.
How about the BRP Evinrude XP50 or XP100 in an Opti? Is the XP100 the same oil Ski-doo uses for the etec sleds? Gotta wonder.
the oil is named XD100, not XP100, and yes, it's the ETEC oil.
even it may be also a super oil for Mercs because it's a special synthetic DFI oil, if I would own a Merc, I would use the oil recommended by Merc.
I also do not use Merc oil in my ETEC, even it would work, I use the recommended XD100 oil.
I am going thru this dilemma today. Went to buy my first round of "stuff" from my newly delivered 2007 300XS with a zero hr new powerhead on a Cougar 21. Boat is new this week to me. Went to local Merc shop, "knowlegable" sales guy pointed me away from Prem Plus towards Optimax/DFI and said it was the newer/better product. I walked out with it. Came home , put on glasses, the OPtimax/DFI product says NOT FOR MOTORS REQUIRING TC-W3... 2007 300XS manual says "MUST USE TC-W3 oils. So back I'll head tomorrow for some Premium Plus...