I just purchased OPTI 2 oil along with a new Toro 2450. When I got home and started to mix the oil I had questions since Toro recommends a 50:1 mix and the prepackaged OPTI 2 I purchased mixes at about 70:1. I questioned the dealer about it and they assured me that OPTI was about the best you could get and that the ratio was fine. That's when I went to the computer to do a little research. I appreciate the info from SnowPro, it means a lot to hear about the oil from another source than just the dealer.
For AZinOH: I purchased OPTI in pre-measured 1.8 oz packets, which by my calculations yield about a 70:1 ratio. I paid $1.70 US per packet.
Thanks all for the discussion. It's great 
