Sentence 1: Dan was driving down the road when he noticed his oil was low. 
 Sentence 3: A week later he noticed that oil was low again 
 Sentence 4:  He decided that now was the time to sell the car 
 Sentence 5:  He put an ad in Craigslist and sold the car two days later 
 Option 1: So he drove to the nearest mechanic who offered to buy his car. 
 Option 2: So he drove to the nearest store and bought some oil.