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I have been following this topic and decided to try Kreen in my Chrysler 440s. I have twin 440s in my boat. One of them has excessive crankcase pressure, thus oil usage. Usually after 8 hours of running at 1900 rpm, the problem engine would use/leak 1 quart of oil. While on vacation, I used...

I plunged myself into reading about the oil additives, etc. I just ordered some 'Kreen' in hopes I will see some positive results. I will change oil to Rotella with Baldwin filters. Will post results. Thanks!

I have twin 440s in my boat. One of the engines is symptomatic of blow by (leaky gaskets, breather cap and PCV a little oily). I have tried many things in hopes of freeing up the suspecteed 'stuck ring' but nothing works. Compression is 145 for 7 cylinders and 125 for one. I am currently running...