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#11076261 - 09/01/15 08:19 AM Mixing oil
Rutster Offline
Extreme Angler

Registered: 01/24/06
Posts: 1105
Loc: Springtown
I just purchased a new to me champion with a 225 opti merc on it. I was going to fill my oil reservoir and noticed the oil I got at academy was synthetic blend. Quicksilver of course but wasn't sure if I could use it with current oil. Someone please help me out here.

Thanks in advance Rut

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#11076277 - 09/01/15 08:25 AM Re: Mixing oil [Re: Rutster]
patriot07 Offline
TFF Guru

Registered: 04/20/10
Posts: 16804
Loc: chateau d'if
On older engines, I try to always stick with whatever oil it's been getting. If you don't know the answer to that, then I would say to just pick whatever you like and stick with that.
_________________________
Life can only be understood backwards; but it must be lived forwards.
- Soren Kierkegaard

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#11076314 - 09/01/15 08:43 AM Re: Mixing oil [Re: Rutster]
JonBoater Offline
Angler

Registered: 03/28/02
Posts: 446
Loc: Too far from Saltwater
Premium Plus is rated for Optimax. I believe one of the specifications for TCW-3 is to be able to mix any brand and not have any ill affects. Problem is I'm not sure Mercury Optimax/DFI oil is TCW-3? But they do claim it will mix with other oils. I know Quicksilver Premium and Premier+ are TCW-3.

Personally I would run the tank down as low as you are comfortable doing and then fill it up with your new brand just to be sure.
_________________________

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#11081881 - 09/03/15 06:06 PM Re: Mixing oil [Re: Rutster]
Rutster Offline
Extreme Angler

Registered: 01/24/06
Posts: 1105
Loc: Springtown
That's good info.... Thanks guys

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#11082909 - 09/04/15 08:22 AM Re: Mixing oil [Re: Rutster]
Dayne Offline
Extreme Angler

Registered: 12/16/06
Posts: 2872
I have been running a trouble free 225 Optimax for 13 years. I've never used any oil except the Mercury DI.

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#11083294 - 09/04/15 11:02 AM Re: Mixing oil [Re: Rutster]
6BOOMER Offline
Pro Angler

Registered: 01/16/12
Posts: 610
Loc: Del Rio, Tx
The BBC has excellent forum on this.See Below:

Please consult your owner's manual, or http://www.mercurymarine.com for the BEST recommendations on each of these items!

This list will be updated as additional information is requested- check it regularly for the most current information!

Oil:
-These are the "top recommendations". Refer to your owner's manual for other oil specifications!
-ALL EFI/CARB 2.4/2.5/3.0L (2-stroke) Engines: Mercury or Quicksilver Premium PLUS
-All STANDARD Optimax (75-250): Mercury or Quicksilver DFI/Optimax Oil
-ALL ProXS Models: Optimax/DFI Oil. Mercury or Quicksilver Premium PLUS is acceptable, but Optimax/DFI oil is RECOMMENDED due to a better additive package to help combat carbon deposits.
-ALL Racing/XS Models: Mercury Racing 2 Cycle Oil pn. 92-8M0078011, Mercury Racing Gear Lube pn. 92-8M0078015. Premium Plus oil may be used as alternative ENGINE oil.

- (Note..... there was some conflicting information on Merc's Website- follow this recommendation for the latest information as it's released!)

NOTE: Mercury/Quicksilver Optimax/DFI oil, and Mercury/Quicksilver Premium PLUS are totally compatible with each other. Although you should use the CORRECT oil, you can switch to the recommended Optimax/DFI oil, simply by adding the correct oil to the tank.

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