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i tried this on my 940 and in MY case it made no difference.
Now im not saying anything agaisnt the product simply it didnt cure my issue (i suspect nothing but a new engien would have...)
HOWEVER within about 1500 miles into the rinses cycle it had dislodged so much crud that the oil filter became restricted and i started to see low oil presure at start up - changed the filter and it went away...
so i can confirm it does something to deposit stuff into the filter, and my non scientific eye down the fill hole measure said it looked considerably cleaner down there...perhaps the placebo effect who knows...
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