I’m not sure how LOP I was, but wanted to make my 1000 mile trip which had slight headwinds without stopping. Cruising at 11,000 on Flight aware  I Did the big mixture pull showing 29”/2400 RPM 15GPH about 2 hours left went to 25”/2400 13.5 GPH . My coolest CHT was 302, to low? TIT 1615 enroute going about 1000 miles while  using 90 gallons. Now questions how do I know how much LOP I was, is 302 CHT to low. I’m missing something since my numbers don’t agree with the POH. It did eliminate a stop