Does the new 3.0 liter MerCruiser engines come filled with the 25W-40 synthetic blend oil that is sold on the shelves? The reason I ask and hear me out on this, is that it is well known in the motorcycle community that the pieces in the engine are not perfect and when you first run that brand new engine, those ill-fitted internal pieces will be sheared off and placed into the oil. Now of course, the transmission on the motorcycle engine is using the same oil, so many new metal components are being sheared off in there as well. On a brand new bike engine, I change the oil/filter at 20 miles and at 200 miles. My oil analysis shows that after the initial 20 mile change, there is virtually no metal residue. I don't like to follow the manufactures advice on changing the oil at 600 miles and having all that lovely metal running around in the system. During the first 1500 to 2000 miles on my bike motors, I run conventional oil so everything can seat well, then I switch over to a full synthetic, especially on the air/oil cooled bikes.(Shell Rotella Synthetic 5w-40) Now, I'm not looking for the typical oil war to break out here, I'm wanting to know, should I apply my thinking about bike motors to this 3.0 MerCruiser AND if I should, does the motor come from the factory with the Mercury semi-synthetic(25w-40) or a conventional oil? If it comes with the conventional oil, I will of course need to replace w/ conventional oil until the appropriate time to switch over to the semi-synth. or whatever I decide to go with. Any advice is as always greatly appreciated!!
I had a Suzuki tech that was doing some work on my bike and said changing the oil out the first few miles of the bikes life is the best 20 bucks ever spent. I figure I can't go wrong for 20 bucks.
