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Now that you say that I remember my Dad talking about that when John Force was sponsored by Quaker State. He was a Pennzoil man. But yes I have seen that sludge. Not my Motor...

That pic brings back memories and your pic is no exaggeration. Seen several, all with Quaker State non detergent oil. Sadly the only thing to do was scrape out the crap the best you could and continue on with it's use. Going with an oil that had detergent would either block oil galleys or it would turn into a mosquito fogger due to losing ring seal as the varnish came off unevenly around the ring lands.
Ron
 
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