What oil do you use for breakin on new 107 build?
Regular oil or Syn 3?
plan on changing it out at 300-400 miles
Thanks

 

I break mine in on Dino oil. It's cheaper and given the initial frequent oil changes that makes sense. Old wisdom was to not use syn for break-in but I don't know if that's the current theory or not.

 

Shell Rotella 15W40.

 

Àny 20/50 non synthetic oil.on my builds,i recommend changing oil every 300 miles up to 1000.then go to synthetic. Could be overkill,but its worked well for us for 35+years of engine building

 

+1 non synthetic 20-50

 

Like Syn-3.

 

Really?
I use Rotella in my Dodge Diesel and love the stuff

So in a Harley for break in may be ok
change it every 300 miles till 900 miles then switch to SYN 3

 

That was what I used to break mine in.

 

Yup, Rotella in my motor the first 2 changes, 100 and 1000 miles. Then the syn of your choice

 

Any good quality 20W50 petroleum motorcycle oil.
We use/stock Spectro 20W50 here, and use/stock Red Line for our synthetics.
We are shop, that does this everyday, not an individual owner