Re: Lower unit Fluid - Any brand or Honda Only?
When I winterize my boat (oh..I can't believe it's getting time to do that again) I just drain the oil that is in it and put in some fresh and cheap motor oil. I just do this to keep the parts coated and displace the water. Come spring, I drain and put in Merc high performace lube ( I have a honda 90). If you use the same oil you put in it before winterizing and the following season (I certainly wouldn't), I recommend the high performance stuff, liek semi synthetic as already suggested. I filled my lower unit with some OMC stuff a few months ago. Later during the season I brought my motor in for a tune-up at my Honda dealer. He called me the following day and said 'Why are you using that non-high performance stuff?' I told him I put the most expensive stuff I could find in it (I had to get this stuff last minute because i was on the road to go fishing and my dealer was closed). I asked him how he could tell it wasn't the usual and he replied that he just could. So, I suppose there is a difference if my mechanic could tell just by the feel or whatever. <br />BTW, he sold me my Honda and he is the one that recommends the hi-perf Merc oil in it.