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Old 06-05-2018, 11:26 PM   #15
dieseldude4bt
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Join Date: Mar 2011
Location: Co
Posts: 412
Re: Rockwell T-221 durability for the long haul

If you over fill it comes out the vent is my experience, I just keep it full and run synthetic 75-90w Valvoline and Lucas synthetic additive, seems to work fine.
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63 k20 with cummins 4bt, owned sence 1982
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