Well I have logged 10 hours on my 2010 vx 1100 and time to change oil....would like to go to Royal Purple or something like that....But the most oil that can be sucked out of the oil tank is just over 2.5 qt. so that means there is still atleast 1qt still in the motor and can I mix the syn. oil with the oil thats in it? what oil would you use?