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| 7.3L IDI (Non-Powerstroke) Diesels Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines. |
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07-28-2008, 11:03 AM
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what kinda gear oil are you guys running?
I was thinking of changing my differential fluids and was wondering what oyu guys use?
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07-28-2008, 11:16 AM
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I changed mine to Royal Purple full synthetic with the posi additive. That was 30 k miles ago. Quiter and pick up .5-1.0 MPG on highway. Hope that helps!
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07-28-2008, 11:28 AM
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thanx anyone else
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07-28-2008, 11:29 AM
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this aint just for my year pickup im askin for everyones favorite
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07-28-2008, 12:39 PM
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07-28-2008, 12:42 PM
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ROYAL PURPLE FOR SURE, IT IS THE BEST!!!!!!!!!!!
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07-28-2008, 01:46 PM
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come on anyone jus say somthin
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07-28-2008, 02:12 PM
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lucas 75-140 synthetic here.
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07-28-2008, 03:03 PM
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08-02-2008, 10:17 PM
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I will be switching over to Amsoil gear oil. Might as well make it a one stop shop. Gear oil, tranny oil, ATF for the T/C, motor oil, bypass filter.
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