Well, I haven't flushed my system yet, but the heat is working at full capacity now. I will eventually get around to doing a full flush and fill, but since I have good heat, I am concentrating on more important things; for example, the girl that braved that cold ride with me, and my upcoming geography test. Among other things, I just recently picked up a 1984 Honda VFR 500 interceptor for $170. The seller couldn't figure out why he didn't have any electrical power; I put some acid in the DRY battery, sprayed some starting fluid in the carbs, and took it for a ride. I do need to pull the carbs off and have them cleaned, adjust the valves and cam chains, and change the oil so It's ready to sell next month, so that will consume a good deal of my time. That should score me a quick $500 profit though!