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Old 08-03-2016, 12:10 PM   #1
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Dexron III

Was checking my hydraulic slide resevior and it says to use dexron II or III. I can only find dexron vi. Does anyone know if dexron VI is backward compatible with dexron II or III?
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Old 08-03-2016, 12:21 PM   #2
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Put in Marvel Mystery Oil. That is what Equalizer told me to use.



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Old 08-03-2016, 07:06 PM   #3
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Dex Vl is the synthetic version of lll. its a up graded version, your fine
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Old 08-04-2016, 08:29 AM   #4
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Thanks guys. I went to a local auto parts store (Advance didn't carry the Dexron II) and they had it there.
Marty, didn't see your post until after I returned and put the fluid into the reservoir or I would have gone that route.
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Old 08-07-2016, 02:57 PM   #5
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I am in the process of buying some Marvel Mystery Oil to top off my hydraulic reservoir. There seems to be more than one type available. There is a MM13R and an MM14R (that are different size containers), am I missing something here? Is all the Marvel Mystery Oil the same and I can mix it right with what is in the tank now? -Glenn
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Old 08-07-2016, 05:56 PM   #6
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The Marvel Mystery Oil I used was in a black and red rectangular quart screw top can. You can mix it with the oil that is already in the system. I took out about 1 quart of the existing oil and replaced it with the MMO.


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Old 08-07-2016, 06:07 PM   #7
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I don't have a dog in the topic, but marvel is very thin compared to transmission fluid. I seem to remember trans fluid is about 20WT.
My only advise is to be careful.


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Old 08-07-2016, 08:32 PM   #8
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Using the MMO on the advise of Equalizer who builds the hydraulic system



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Old 08-08-2016, 07:19 AM   #9
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Dexron III

In an effort to get rid of the annoying jack noises I removed all the fluid in the reservoir then added Mobil synthetic and one quart of the Cat additive. After speaking to the Equalizer rep at the Perry FMCA rally I added a quart of MMO (after removing one quart from the reservoir). The MMO seemed to make the noises worse so I added a second quart of the Cat additive. Things are somewhat better but the jury is out until we get into weather with some significant temperature swings.


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Old 08-08-2016, 05:37 PM   #10
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Quote:
Originally Posted by Iwannacamp View Post
I don't have a dog in the topic, but marvel is very thin compared to transmission fluid. I seem to remember trans fluid is about 20WT.
My only advise is to be careful.


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The MM oil was added to mine by the Equalizer service guy working on my system. I would guess it is ok. I agree that A heavier or thicker oil would help eliminate the leak down if that's is what it is doing.
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