Date: Wed, 21 Jul 1999 09:31:50 -0500 From: Greg Youngen <youngennopsamcso.uiuc.edu> Subject: Re: oil additives (cleaners and motor up)
I tried the engine flush for the first time this weekend. I just bought a 93 Jeep with the 4.0 litre engine and 125K miles. The car had irregular service documentation, and looking into the oil fill hole and on the dipstick there was what looked like baked-on sludge. It left me with the feeling that perhaps there had been some extended periods without fresh oil. I bought the STP engine flush and added it to the existing oil (which was fairly clean), ran the engine for 20 minutes at 1500 rpm, then drained the dirty oil. The oil/flush mixture was very dirty coming out, but I didn't notice any "chunks" or large particles. I then added about a half quart of oil with the drainplug out to float out whatever flush might be left in the bottom of the oilpan. Also replace the oil filter. The baked on sludge on the dipstick and lifters had been reduced somewhat, but not as much as I was hoping for. I filled the crankcase with Mobil 1 10w30 (previous owner had used conventional oil) and have run it a couple of hundred miles with no ill-effects. The oil is still very clear, but it may take a few thousand miles to get a better idea of how long the oil stays "clean." _________________________________________________________________ Greg Youngen St. Joseph, IL
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