I know a lot comes down to personal preference. But I was just wanting to get a general idea on what pre mix you all are running in your 250 two strokes. I have a 1993 KX 250 with a fresh motor. Ive been running Lucas Semi- Synthetic pre mix with pump gas and it seems to run good. Im mixing it 40:1. Was running it 32:1 and it seemed to load up a bit. I have only owned one other 2 stroke and it was a 1986 Honda 250r trike, built to the hilt, I ran Golden-Spectro with high test. Still fairly new to the 2 smokes!