Weird... very weird EOC results.

[H-Man]

Something odd I have noticed: On my best tanks, I never EOC or kill the engine at lights (the 39. something in my fuel log is because the pump popped early and I don't top off because it throws off my calculations even more.)
I might have a buggy sensor, or the oil in my gearbox may be too thick (75W-90 gl5 with LSD additives wasn't my brightest purchase decision,) I'm going to go to a better gear oil in the gearbox as soon as I can.

Any ideas?