My '85 Ram (318, 120K) must be "burning" a small amount of anti-freeze, about 12 ounces every 300 miles.

I say this because: All new heater & radiator hoses, new pressure cap, no obvious leaks in around the engine/hoses/radiator. The exhaust pipe is often "wet" inside and the ground under the tail pipe tip shows fluid build up when idled in one place for an extended period of time. The overflow tank goes down about 2 inches every 300 miles.

No evidence of antifreeze on the oil dipstick, never overheats, even with the A/C on and in stop & go traffic.

Can someone here please recommend a stop leak that will slow/fix this slow leak...but NOT stop up the radiator/colling system and make it overheat?


Or should I just continue to keep an eye on the overflow tank level and keep adding antifreeze/water? Perhaps this is not worth doing anything about??
Thanks!