hey everyone. im just wondering about changing oils(brand and type) in my 4 stroke 2004 450 EXC. I just had a new top end put in and run the new motor in for half a tank of fuel but they used semi-synthetic and i want to change the oil to Motul 7100 fully synthetic and wondering if it's ok to do so or if it's not good to mix the oils?
I still am going to run the motor in for another half a tank of fuel but want to use the good oil.
Ive completely drained the old oil from the drain bolt already, just want to know if it's ok to put different fresh oil in right away.