This happend to me I couldn't get the lugs off after some moron tightened them with an impact gun. I used and 18" breaker bar and an impact socket and placed one foot on it and jumped on it while balancing my hand on the roof heard a loud pop and the lug broke loose, Did this on othe four and it worked as well.
Good Luck
PS NEVER put greese or antiseeze on lug bolts.