At another site warning about the perils of E-10 they said regular 87 octane with MTB, or MTE, or MSG, should not be mixed! Herein Maine we have escaped E-10 so far. But going to the Cape this summer that is all they have E-10. I was planning to top off here with the good stuff and get some down there if needed. My tank is 120 and most fishing there is inshore. I did it before without any problems. Except when I got home and the boat sat a week when we went out she was missing and sputtering to beat the band. I gave her a big shot of regular 87 again and have been smooth running since. Any thoughts? Thanks, Gary