Sass...the one that has done a triathlon, right??
Here is a link for oil calculations...Gas Oil Mixture Ratio Calculator
I've used the Lucas and loved how it did not smoke...a good synthetic will do the same.
I've been told 4 tank full so about 2 gallons for the break in. But I have also been told 2 tanks for break in????
I used synthetic for my break in and had no problems, so I believe you will be okay.