To make the trip without landing, lower RPM to 2100, begin aggressive leaning, engine sputters @ 9 GPH, enrich to 10 GPH, EGT's go up to 1300, CHT's to 350, GS ~ 190-195 kts with same tailwind. Now fuel computer says 1200 nm left, 1000 to go, have fuel margin and do not have to land.

 

Am I hurting my engine with the aggressive leaning??