Change interval for high end synthetics is NOT 5k miles. 25k miles, with warranty. Change the filter every 12.5k miles, again warranty. Price per quart is around $6. Filter for a Contour is less than $10. Let's NOT use the same filter for dino oil. Synthetics require better filters. And by high end, I'm talking synthetics formulated to run more than 7.5k miles (Mobil 1). Who's manipulating numbers, change the oil as specified by the oil manufacturer. And my Contour uses 6 quarts of oil..not 5. We'll use your outlandish 40k per year (very high number).
Dino (Mobile 0) (3k)
5 quarts of oil on sale..................4.99
Motorcraft Filter........................3.99
1 oil change.............................9.00
13 oil changes per year................$117.00
Amsoil (for example)
1 quart + 1 filter @ 12.5k..............$16.00
6 quarts + 1 filter @ 25k...............$46.00
1 quart + 1 filter @ 37.5k..............$16.00
Total...................................$78.00
I still save $39 (plus labor) with my higher capacity engine that the starter spins at the same speed whether it's -10F or 90F. Now let's add labor of $10 per time on the lift. Synthetic - $108. Dino - $207.
What's your problem Jack?
