This week on Car Talk, two separate incidents create the same reaction: a two-word phrase beginning with "Oh", and ending with a word that would get an FCC Commissioner's shorts in a bunch. First, Nancy drives her VW Bug over a boulder in Death Valley, then Chad snaps off the key in the ignition of his Maxima. Will Tom and Ray provide aid and comfort, or just have a few laughs at Nancy and Chad's expense? Meanwhile, down in Florida, Melissa is envisioning the words that may come spewing from her husband's mouth, if she lets him go ahead and change the oil on their BMW. Is her hubby right, that 15,000 miles is too long to wait between changes-- even if it means that BMW is picking up the tab? Also, find out why the guys' advice to thrifty teenager Stephen may soon have his parents, and his parent's lawyer, lighting up Line 2 in the Car Talk studio. All this, plus a new puzzler from the world of marital relations, this week on Car Talk.