Sterling Diff Oil - Ford Powerstroke Diesel Forum

 
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post #1 of 8 Old 01-07-2008, 04:00 PM Thread Starter
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Sterling Diff Oil

I have a 1997 F-250 with the Sterling rear diff. What oil weight should I use. I've searched the forums, however most are for 1999 and newer. Thanks for any help.
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post #2 of 8 Old 01-07-2008, 05:41 PM
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i just added a pml rear diff cover to mine and i went with amsoil 75-90w full synthetic oil. everything seems to be working great so far.

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post #3 of 8 Old 01-07-2008, 05:42 PM
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It should be the same. I think all the Sterlings take 75W140 synthetic.
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post #4 of 8 Old 01-07-2008, 06:55 PM
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75W140 synthetic

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post #5 of 8 Old 01-07-2008, 06:55 PM
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There seems to be alot of different opinions out there, as I recently had the same question.

My FORD manula calls for 75W-140. So I am ordering some Royal Purple, in that weight.

I "heard" there was a TSB to change it, but I can't find it, and I never saw it posted.

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post #6 of 8 Old 01-07-2008, 06:58 PM
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75 W 140 here too.

Synthetic! I bought mobil one w/ lsd additive already in it!

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post #7 of 8 Old 01-07-2008, 07:18 PM
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Cleaning the fuel bowl

75 / 140 here to - mobile 1 with the additive
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post #8 of 8 Old 01-07-2008, 09:19 PM Thread Starter
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Thanks for all the replies. 75 / 140 it is. Thanks again. You guys are on top of it.....
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