i have a friend that deals in amsoil and gave me some 100-1.
i'm old school and just can't use the stuff.
all my break in time it has been around 40*, which is good.
with a #64 main jet i get a little 4 stroke in my mid range that i like.
keep em cool and lubed....
my early 4 stroke motorcycles it was straight 30WT for 300 miles for break in.
my wife's 2016 toyota got it's 1st oil change at 10,000 miles.
i just can't grasp that theory !!!!!!!!!!!!!