JUST BOUGHT A 87 HURRICANE. FROM WHAT I HAVE READ IT WAS A WISE CHOICE. I NEED TO REPLACE THE REAR TIRE. IT HAS 140/80-17 ON IT NOW, CAN I PUT SOMTHING BIGGER ON THE RIM? ALSO WHAT KIND OF OIL WILL I BE NEEDING TO CHANGE IT WITH ? THE ENGINE THAT IS, NOT THE TIRE. THANK YOU FOR YOUR TIME