Any reason not to mix left over Stihl, Echo and Husky premix 2 stroke oils at 50/ 50 with Maxima Formula K2 synthetic in my OPE such chainsaws, blowers , weedeaters. I've decided to run K2 full time and just want to use up remaining leftovers. I'm getting the K2 at $19 a litter vs way overpriced brand names OPE oil, so I'm going this way for now on.