My bike is due for an oil change but winter is coming. I have about 2 moths of riding left. I hate going over. I run mobil 1 15w50 in the summer but its getting cool now and want to do the oil change with mobil 1 5w50. I have the oil but should i do it now and leave the new oil in all winter? and if i do that is it still good after 3 months in storage? i hate to change it then have to do it again when i bring it out in the spring! is all that changing necessary?? Thank you so much for all your help!!