just finished a 1200 round trip to omaha. to omaha, straight oil. changed oil in omaha, here's the math:
28 mpg on the way there......
30 mpg on the way home......so, math:
3000 mile oil change/30 mpg = 100 gals used during course of oil change
2/28 = 7% savings
7% * 100 = 7 gallons saved
say $2.65 a gallon for premium
7 * $2.65 = $18.55 saved.
not to mention, lucas takes the place of a quart of oil for say $2.50
total savings to use lucas: $21.05
total cost lucas < 9.00>
net savings $12.05
so, every quart of lucas you buy for $9.00 puts $12.05 in your pocket....enough to pay for the oil change.
free oil changes by buying lucas.......wish it worked that way with other stuff.