Best oil for Merc-Optimax??

[tafadzwa]

Your thoughts on the best oil for a 135 Merc-Optimax? I was picking up some Quicksilver at a Gander Mountain and was told a couple of things:

• One guy said that the Quicksilver that lists Optimax on the label is not the best

• Another guy said Penzoil synthetics were better

Any ideas? I keep hearing different info.

thanks

[HARPOON-OR-BUST]

I USE AMSOIL HP INJECTOR OIL IN MINE. WORKS GOOD.

[Sportland_Bait]

The oil that we sell is Mercury oil specifically labeled Opti-Max. It comes in a black bottle. It is also the same oil that is given to the Mercury pro staff for use in the Optimax engines. It is what I use in my 135 and it seems to do the job.

Jason Erlandson

[Crankin619]

The black bottled Optimax Oil or the Quicksilver DFI oil is what I use. This is what is recommended in your owners manual.

[Surface Tension]

I'm not qualified enough to recommend any oil other then what your outboard manufacturer recommends.

[TSCTSC]

Basically...NOBODY KNOWS. The manufacturers would generally recommend their own oil or other equivalent TCW3 oils. Other than that, no one knows who is the best oil. All opinions are anecdotal at best. Unless we can get some scientific data that is collected in a systematic way, we would not know.

[Kevin Turner]

Mercs DFI/Opti oil is the safe bet.

[TravisC]

the best oil to run is the opti oil that way if you do have a problem you wont run into any warranty issues.

[PerchJerker]

I have a buddy with a 225 Opti from the years when they had lots of trouble and he's had trouble with his too (reed valves). After they got it running again the mechanics told him he should switch to the DFI oil, which he did and he thinks his motor runs better with it. I have a 175 Opti and I use Merc's DFI oil in mine.

[Fishbitten]

The DFI oil as an agent in it to prevent carbon build up too avoid problems any oil you choose must have this, Do Not use standard tcw3 oil. I have a 150 opti max 98 model and use merc oil exclusively run time 310 hrs. shop time 0