Valvoline Premium Blu vs Valvoline 5w-40 synthetic

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#11

01-21-2013, 03:50 PM

HeavyAssault

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#12

11-10-2014, 04:45 PM

Regcab6oh

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Quote:

Originally Posted by Mdub707

Many 6.0 owners have used the Valvoline premium blue 5w-40 with good luck. I tried the 15w-40 and hated it, my truck ran immediately worse than the rotella 15w-40 I took out of it.

What were your symptoms while using the valvoline cummins oil? I recently did an oil change and used the cummins oil and my truck instantly ran terrible. Mostly on a cold start. I also came off of using the rotella in my 6.0

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