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Author Topic:   Optimax Oil
JoeyP posted 02-24-2002 06:37 PM ET (US)   Profile for JoeyP   Send Email to JoeyP  
At the Mercury dealer's open house this past weekend, I was told that using the Mercuury DFI oil is no longer required for the OptiMax motors. You can still use it if you want but just don't mix it with the Mercury Premium two-cycle. Run out the DFI oil first before switching. Did anybody else hear about this? It sounds good because that DFI oil is more expensive.
JoeyP posted 02-26-2002 09:05 PM ET (US)     Profile for JoeyP  Send Email to JoeyP     
I also forgot to mention that Mercury also recommends running a fuel additive similiar to Yamaha's Ring Free with every tank fill. I know this was a must for the Yamaha OX66 engines which was recommended in a service bulletin.
JoeyP posted 03-02-2002 09:43 PM ET (US)     Profile for JoeyP  Send Email to JoeyP     
More info today: The DFI oil will still be available. Once again though, I can't get anyone to agree on which type of oil to use, the standard premium or the DFI oil. Has anybody else asked their mechanic?
captreils posted 03-03-2002 08:57 AM ET (US)     Profile for captreils  Send Email to captreils     
I am going to a two day OptiMax class offered by Mercury for their dealers tomorrow.I will get all the right information and let you know. Also, if you have any other questions let me know so I can find out.
Salmon Tub posted 03-04-2002 01:37 PM ET (US)     Profile for Salmon Tub  Send Email to Salmon Tub     
I don't know about the Optimax oil, but I have it from five different experts, dealers and mechanics that I should use only the oil that they sell because all the others are junk. Yamaha's oil is better that the rest, Merc's oil is even better than that, OMC can't be beat, but if you want your engine to run clean and avoid potential failure, you need to buy this oil... I also heard that all TC-W3 2 strok oil comes from the same refinery (from a mechanic who doesn't sell any oil) and that the differences are very small, except for grade: i.e. Merc. oil as opposed to Merc. premium Oil, and so on. I was also told that you could mix but if it sits around in your tank as a mixed liquid it may begin to gel. And don't mix plain with synthetic.
captreils posted 03-04-2002 06:45 PM ET (US)     Profile for captreils  Send Email to captreils     
I asked the instructor today about the oil.He said you can use premium + oil or DFI oil on the optimax,you can not mix the two oils though.he also said that you must use Quick Clean in your fuel(decarbonizer).The DFI oil can only be used on optimax engines.He did not know anything about the DFI oil being discontinued.
JoeyP posted 03-05-2002 04:35 PM ET (US)     Profile for JoeyP  Send Email to JoeyP     
So if you use the premium + oil you need to use the decarb additive? If you use the DFI oil then no additive is required? Or use the
carbon clean all the time with either oil? I know with the YAM OX66 motors, you had to use the Ring Free all the time.
captreils posted 03-05-2002 06:50 PM ET (US)     Profile for captreils  Send Email to captreils     
from what I was told you must use Quikleen no matter what oil you use.He said there is a service bulletin on it,I will try to find it tomorrow and let you know
lhg posted 03-06-2002 06:58 PM ET (US)     Profile for lhg    
Mercury "Quick Clean" (supposedly "Techron")
is the great carbon deposit eliminator, so it would make sense that it's use in a DFI engine is important. Carbon build-up has been the great killer of these engines.

Even in regular 2-strokes, it's use is recommended every 4th tank of gas. It costs about 11 cents a gallon to use. I swear by it!

JoeyP posted 03-07-2002 06:58 PM ET (US)     Profile for JoeyP  Send Email to JoeyP     
Captreils or Ihg,

If the DFI oil is supposed to be better why do they allow both types of oil to be used in the OPTI's? I would imagine the synthetic DFI Oil would leave less carbon.

captreils posted 03-07-2002 09:12 PM ET (US)     Profile for captreils  Send Email to captreils     
I have been told that the DFI oil flows through the crankcase better
JoeyP posted 03-13-2002 09:57 PM ET (US)     Profile for JoeyP  Send Email to JoeyP     
I received more info from the dealer. Merc realized that the DFI oil is not available at all fuel locations. The premium plus is more readily available. This is one of the major reasons that the DFI oil is not soley recommended. Also, checking with three different people from Merc, the carbon free additive should be used all the time in the gas tank.
bubbahusband posted 03-29-2007 08:44 PM ET (US)     Profile for bubbahusband  Send Email to bubbahusband     
[Following up on this discussion FIVE YEARS later...] I was told by three dealers that Mercury OptiMax motors are shipped from the factory with PremiumPlus in them, and they are talking about stopping the production of Optimax and DFI oil.
Ferdinando posted 03-30-2007 12:13 PM ET (US)     Profile for Ferdinando  Send Email to Ferdinando     
If you can't mix synthetic with regular oil how come merc sells a premium blend that is part synthetic???????
jimh posted 03-30-2007 12:15 PM ET (US)     Profile for jimh  Send Email to jimh     
I don't have too much faith in second-hand represenations that people make about the recommendations or policies of a particular company. I am sure there is information available directly from Mercury about the status of their oil products, and whether or not they should be mixed.

A Mercury dealer would also be a good source for information on what oil products are currently available. I really have no idea why this FIVE YEAR OLD discussion was revived.

Royboy posted 04-09-2007 05:18 PM ET (US)     Profile for Royboy  Send Email to Royboy     
Here's why this keeps coming up:

1 Gallon of Mercury Premium Plus = $12

1 Gallon of Mercury DFI = $32

The manufacturer recommends either oil for Optimax engines, primarily because DFI oil didn't exist when they rolled out the Optimax product line. DFI oil was developed afterwards, and is claimed to be superior, but both are still recommended. They should not be mixed per the owner's manual on my Opti. It doesn't say how to change over from one to another. I use the DFI oil because that's what was in it when I bough the boat, and I can afford to continue doing so.


jimh posted 04-09-2007 08:34 PM ET (US)     Profile for jimh  Send Email to jimh     
Please see your Mercury dealer for information about the availability of Mercury oil products. It has been five years since someone announced on the behalf of Mercury that a certain oil was being discontinued, and, as far as I can tell, it sure looks like it is still being sold.
28 Reborn posted 04-13-2007 11:46 PM ET (US)     Profile for 28 Reborn  Send Email to 28 Reborn     

The DFI oil was developed to address the need for an easily dispersed oil into the induction system of the engine under cold-weather operating conditions (this from conversations with Merc Dealer techs. In the North country in winter the Premium-Plus oil does not "spray" as well into the intake runners as the Synthetic stock DFI Oil (BROWN stuff).

If it's not freezing out, the Premium-Plus (Dark GREEN) is a fantastic oil to use in the Opti-Max engines and is Fully Endorsed By Mercury For That Application.

And YES....Use Mercury "Quick Kleen" in a 70 Gallons Gas to One Pint Bottle Ratio in EVERY tank.

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