Re: 100:1 Mix
the fact that performance was not restored immediately, but came back gradually with the burning of a tankful ... well...
.... this does not rule out my hypothesis that the problem was related to the removal of copious amounts of carbon through detergents in the new oil and also the <smokefree lean-burn effect>
...as per my post on the last page...
in all good faith, 2door, i reckon this is what is going on with your opti-2 experience