I changed to Amsoil synthetic 10 days ago. The blow by has been dramatically reduced.
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On a sadder note, I have lost the ability to easily keep the front under side of my truck clean.
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1999 Dodge Ram 3500 Quad Cab 5 spd; 4:10 LSD rear; Mag-Hytec diff. cover; US Gear EGT and Boost gauges. Amsoil foam air filter and synthetics from nose to tail.
Cummins Power, don't leave home without it

On a sadder note, I have lost the ability to easily keep the front under side of my truck clean.

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1999 Dodge Ram 3500 Quad Cab 5 spd; 4:10 LSD rear; Mag-Hytec diff. cover; US Gear EGT and Boost gauges. Amsoil foam air filter and synthetics from nose to tail.
Cummins Power, don't leave home without it