I figured it out guys. Im getting 3 2000 lb o2 cylinders to one 20lb propane. I had a leak at the o2 regulator which is now fixed. Comparing results to my buddy who owns a salvage yard for 30 years, he has the same consumption. Now Im getting the bottles for 21 bucks under discount. So it still helluva lot cheaper than running acetylene at 71+ a bottle. So thanks for the insight, but the problem was staring at me all along...