Hi all, my 01' SRW started making coolant disappear about a month ago, but here lately it's gotten worse. It has been using about a gallon every 40 miles. It's not leaking on the ground, it wasn't in the oil until recently, and I can't tell if it's burning coolant. I just put a new water pump in about 10K miles ago, and the front cover didn't look bad. There is not fuel or oil in the overflow tank. I have been checking the oil every time I start it and aside from being VERY black it was OK. This last time it had the oily-white sludge on the upper half of the dipstick, so now it is parked and awaiting a compression test. I'm thinking maybe a bad head gasket. Does that seem logical?