Tim,

If you take an oil designed to run at 80:1 - 100:1 and run it at 40:1 you will have problems. If you want to run an Amsoil product at these lower ratios us Dominator instead of Saber.

GENERAL STATEMENT, not directed at anybody: I generally recommend people run the oil recommended by the person supporting their warranty. If you bought from Bob at DLUSA then I guess you could use the Saber at 80:1 per his recommendation, but if you bought from Tom at Valleyview then honor his recommendation if you expect him to honor your warranty.

Another consideration: IN MY OPINION I believe the Walbro carbs better run with a slightly more viscous fuel/oil mixture up to a point. My engines run just fine and I seem to have better mixture control than some friends who run the thinner oils.

I use Pennzoil at around 40:1, Honda Racing at 32:1 (designed for this ratio), Belray at 40:1, Redline Racing or Stihl Synthetic at 50:1, depending on which bottle I grab when I reload the gas can. All work very well. In fact, these go into our DL-50, ZDZ 80's, DA-100's, and DA-50 with excellent results.