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Hahaha ive used it before to quiet lifters and it works, and being these filters have no drainabck valves i threw some in, i think its quieter, but who knows haha

Just changed my oil and put in 18qts Shell Rotella 15w40 and 4 qts lucas oil additive. i must say its alot quieter on cold start ups with the additive. I use Mobile Delvac in my Duramax and the valvetrain with 203k looks brand new, and i use Rotella T 15w40 on all of our fleet trucks.