I've heard of guys using tranny fluid, Sea Foam, clean oil, etc, but I was wondering what you guys thought about this. I'm trying to get my truck in shape for winter, and I'd like to de-sludge the motor. I just changed the oil last Sunday, and have been getting blue smoke at start up since the oil change. Didn't do it before I changed the oil, so today I checked the oil level again and noticed it was overfilled by about 1/2-1qt. Apparently I bought a 5qt jug (thought it was a gallon), poured all that in there along with another 1.5 qts. Basically I thought I put in 5.5qts, but really it was 6.5qts. :idiot: Didn't know it until I looked at the jugs at the parts store today, and saw they were 5qts instead of the normal 1gal size. So, I promptly drained out some oil until it was at the proper level. Then I put in a new PCV valve, poured Sea Foam down the TB twice, replaced the air filter with a brand new K&N style filter, and I'm going to get a new crankcase breather tomorrow. Everything was kinda sludged with old oil, so that's why I'm wanting to flush the motor out. I'm thinking tomorrow or Monday I'll flush the motor, change the oil again, put in new spark plugs and maybe wires and a cap and rotor too. Pretty much do a full tune up before the winter hits. I've got another bottle of Sea Foam that I could use to flush the motor, or I could get some tranny fluid or something else. What do you guys think???