I need some advice, I've looked it up several times and have found way different answers, so I will give you the specifics. Motor: Dax 69cc bottom end, top end kit from fred at crmachine.com and a torquer 2 exhaust pipe from arrow. BRAND NEW Oil: Lucas semi-synthetic. It says "designed for any oil injection system or pre-mix UP TO 50:1 (should I use a standard oil instead of semi-synthetic for break in instead?) Putting the bike together tonight and really want to do this the right way and get the most performance out of the engine. What ratio should I use with this oil, and for how long or should I go with a different oil?