Don't do it! If you want to de-sludged your motor I suggest you drop the pan, clean the pickup screen and oil filter mount passages. It's a dirty job but, someones gotta do it... I'm sure once you put that stuff in there you'll never get it all out and your just going to ruin the viscosity of your new oil.
Bologna!
A friend of mine recently had a Luxus mechanic suggest to him that he add a qt of tranny fluid to his crankcase just before his next oil change to clean it out. The Luxus had 130K miles on it.
Anyone every try this on an Isuzu? I know tranny fluid is high in detergents and is basically 20W oil. Thoughts?
Running a quart of automatic transmission fluid just before an oil change will not hurt a single thing. Yes, it will work to help cut some varnish out and keep things nice and clean inside. People have been doing this for years and I do it myself. It works just as well as any "engine cleaner" additive that you buy off the shelf.
Just before you change your oil (30 miles or so) add a quart of tranny fluid (just don't over fill the crankcase... drain a little out if you need too) and go drive it for a while... Once you add the tranny fluid in, I recommend changing it out as soon as you've driven it some (without shutting down..) By that, I don't mean don't shut the engine down.. I mean don't wait 3 days later to change it. Go out and run it for an hour or so and then come back and change it... Be sure to change the filter as well... and you won't have a bit of problem.
