I would change the timing chain in the near future. The stock chains are JUNK. I've seen them ready to jump a tooth by 84,000 miles on "an old man's car"...
I gained 1 - 1 1/2 MPG from replacing the stock 318 chains with a double roller true roller. Here's a good chain at a reasonable price that I've run over 250,000 miles with no problems.