healey36 wrote:More proof that ATF is good for many things besides ATF...
Automatic transmission fluid is
EXTREMELY high detergent. I think it'll damn near penetrate glass!

You get an older engine that you know is just full of sludge, add 1 quart of ATF and spin it up to 2,000 RPMs for a half hour, drain it (HOT) and change the filter, then fill with fresh oil and filter, (no more ATF), and repeat. Be prepared to do that three times in a row without letting the engine cool down, because if you don't, the ATF will have loosened all the paraffin and sludge that will gravitate to the pan, and seal the oil pickup off perfectly, and the next cold start will lead to disaster. Let it sit 10 minutes after the 3rd draining with the plug still out, then refill and change filter again, then drive it for a couple of hours, and then knock the oil and filter out again, refill, and you should be good to go. Oil and filters are cheap; engines are rather expensive.
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