Another qustion I have that is confusing this matter (to me at least) -

Does this re-setting of the mpg happen when both Trip A or Trip B pass the 63 mile points individually (i.e. the re-setting would happen to each Trip meter individually, and therefore might even be happening in each meter at different times). Or is this re-setting happening when the true odometer readings of the car (the ACTUAL odometer, not the trip meters) passes the 63 mile points?