Bought from Enterprise Car Rental/Sales 12/01 24,000 miles
feed Her Motorcraft Syn. Blend 5w30 and an FL1A every 3,000 till 84,000/ aftermkt warrany ran out. Changed to Mobil 1 Full Sny. Truck/SUV and an FL1A every 5000. She currently has 141,500 and still runs strong as ever. (Knock on Wood)/Knuckles on Head
I also run Full Sny Gear Oils the the differentials
Motorcraft Synblend 5w30 $2.10 x 5qts = $ 10.50 + $4.00 MC filter = $14.50 every 3000
60,000divided by 3000 = 20 oil changes x $14.50 = $290 for 20 oil changes
Mobil 1 Full Syn 5w30 5qts/$19.96 + $4.50 MC filter = $24.46 every 5000
60,000 divided by 5000 = 12 oil changes x $24.46 = $293.52 for 12 oil changes
with the full Syn I do see the oil coming out cleaner even after 5000 miles than the Blend only after 3000 miles