New 12V Battery.

210,940 total miles.

The 12V battery was last replaced in May 2018 at 139,897 miles (Motorcraft BXT-96R-590). It lasted about 70k miles and 7 years. This time I went with a "Total Pro" 96R-T battery from Autozone. It includes a one year warranty and the cost out the door was $140.24 including the core charge trade-in of my old battery.

29.6 MPG

340.7 mi, 11.510 gal @ $4.299 = 29.6 MPG

210,889 total miles. Mobil on Rt 6 in Andover.

29.9 MPG

329.0 mi, 11.018 gal @ $4.199 = 29.9 MPG

210,548 total miles. Shell on Rt 4 in Farmington.

30.8 MPG

330.0 mi, 10.711 gal @ $4.599 = 30.8 MPG

210,219 total miles. Sunoco on Farmington Ave in West Hartford.

29.6 MPG

370.7 mi, 12.507 gal @ $4.390 = 29.6 MPG

209,889 total miles. Gulf on W Main St in Avon.

29.7 MPG

336 mi, 11.304 gal @ $4.499 = 29.7 MPG

209,518 total miles. Shell on Route 4 in Farmington.

Replaced Serpentine Belt and Tensioner.

209,267 miles.

New serpentine belt and tensioner: Gates K060551 belt ($16.96) and Dayco 89625 tensioner ($112.79), both from Rock Auto. The original belt still looked fine and I didn't see any issues, but after 18 years and 200k miles, Gemini and I figured we should go ahead and replace it. Installation was pretty straightforward.