What fluids to use? - Ford Powerstroke Diesel Forum
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Old 09-08-2012, 07:41 PM
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What fluids to use?

My truck 04 fx4 has now turned 75K and I want to change all the fluids I don't know what viscositys and quantities to use in the tcase, tranny, front & rear diffs and also what makes do you recommend?

Thanks
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Old 09-08-2012, 07:47 PM
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I recommend mobil1 for the diff fluids. 75-w90 front 75w-145 rear. Valvoline is good for mercon V.

Use mercon V for the Transfercase.

Mercon SP or LV for the transmission.

Mercon V for the power steering.

Dot 3 or 4 for the Brake fulid. I use DOT 4.

I and many get filters from here. I buy the bulk discount and sell the extras for my 2 next door neighbors that have 6.0's
www.dieselfiltersonline.com



When have you changed the
trans fluid, external filter, and internal filter?
the air filter?
Powersteering fluid?
Brake fluid?
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Old 09-09-2012, 06:33 AM
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Thanks for that haven't done any up untill now all it has had done to date is EO and filters evry 10k and fuel filters every 15k
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Old 09-09-2012, 06:44 AM
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that seems a bit long on the EO. 6.0's are sensitive you might cut those intervals down a bit.
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Old 09-09-2012, 06:54 AM
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need a link to a online owners manual ?
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Old 09-09-2012, 08:54 AM
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Quote:
Originally Posted by ZMANN View Post
need a link to a online owners manual ?
Here you go.
https://www.fleet.ford.com/maintenan...ls/default.asp
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Old 09-09-2012, 09:26 AM
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For standard engine oil, go between 5,000 to 6,000 miles. Syn go 6,000 to 7,000. syn with a bypass I have gone up to 9,500 miles, that was my last oil change. this one I will be going 11,000 miles. I test the oil and I keep getting good results.

Transmission is 30,000 miles depending on how you change the fluid, then i will be shorter.
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Old 09-09-2012, 11:42 AM
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I haven't seen any problems going 10k on sythentic oil but I guess we will see when my next sample comes back.
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Old 09-09-2012, 11:46 AM
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The last time I had my standard oil tested (Blackstone), they recommended that I push it out to 9k miles ... I have not been brave enough to let it go that long though.

I will probably switch over to a synthetic on the next change.
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Old 09-09-2012, 11:52 AM
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I used amsoil in all of my fluids. You can go to there website and it will tell you what to use and how much it holds as well i like amsoil product but that is my .2 cents
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