Just seen an F7 in the shop that was burning about 76 : 1 fuel ratio with factory pump settings. Way to lean guys! I would suggest people do a ratio test next time out. 50L gas = 1L oil. Anything over 55:1 I would adjust up, anything in the 40-50 range is normal considering varying throttle position. Most guys aren't scared to burn a little extra oil vs not enough.