Originally Posted By: Quattro Pete
Originally Posted By: coopns
I had some Super TECH Universal 2-cycle oil (blue bottle). The trimmer was a 40:1 ratio.
Just to be clear, the ratio is determined by the particular 2-cycle oil that you're using and not by the trimmer itself. So, you should refer to the instructions on the bottle.
With all due respect, I disagree. The guy who builds the particular equipment should be the guy you listen to regarding mix ratios. In others words, if Stihl says to mix their trimmers at 50:1, then you should follow that advice in lieu of what is printed on the side of an oil bottle.
Having said that, I do have Stihl OPE that recommends 50:1 ratios. Yet, I use Amsoil Sabre 100:1 in all of them. But as per my comment above, I always mix the Sabre at the Stihl recommended ratio of 50:1.
If Amsoil figures their Sabre is good enough to run at 100:1, then I know it will definitely be good enough (better) at the Stihl recommended ratio of 50:1.
I know there are lots of folks who ignore OPE manufacturer's recommended ratios, but I really don't know why. I'd save very little money running my OPE at 100:1, for instance, and the brain damage it would give me would not be worth it.