Kathy K's Perkins 4-236 consumes 1 qt, of oil about every 30 hours. When I bought the boat the engine had 400 hours since being rebuilt with a long block and now has 800 hours. This oil consumption seems constant. In every other aspect the engine works fine, little smoke at startup, no oil sheen on exhaust discharge. The only thing I can think of is that the engine was run too slow before I bought the boat and that the rings are gummed up. Has anybody had any experience freeing up stuck rings with an oil additive? Phil Keys Kathy K Willard 36, hull #34 Port Hadlock, WA 98339 philm@keysfamily.org