2003 Ford Focus SE Sedan (2.3L)
Changed oil and filter on 12/20/09 @ 79,230 miles
Valvoline MaxLife Synthetic 5w30 / 4.5 quarts
Purolator PureOne 10241
Also changed out coolent / Prestone 50/50 Long Life
Prior to oil change, added Chevron Techron Fuel System Cleaner /
12 Oz bottle in 14 gal fuel tank (at 78,950).
After oil change, I'm using a maintainance fuel system cleaner (Redline Sl-1) of 1.5 to 2 oz. @ every fill-up. Vehicle runs quiet and much smoother since I began using a fuel system cleaner as well as getting 1.5 to 2 more MPG.
Current mileage 82,120
Will change oil & filter out between 6000 to 7000 miles. Plan on doing a UOA at that time.