DTE and Distance travelled.

[Crash Lander]

I always reset my km travelled to zero whenever I fill up, as I presume most people do.
I like to check regularly what the total of my DTE and km travelled equals.
In a typical tank of fuel for me, they always total around 730km. If I do a few short runs around town, it drops to the 500's but after the trip home, it's always back up to total around 730km again. I usually fill up again when I've done about 600km or so, and the dte still usually says about 120km or so to go. If I do a long run, say from Geelong to Warnambool or something similar, the total increases, not surprisingly.
The highest I ever saw the total was 915km.
Now, a few weeks ago, I got a new exhaust. Was told it would use less fuel, etc. In a normal week of running, I noted that the dte and km travelled total had increased from about 730km, to around 780km, so it would seem better fuel economy has resulted from the new exhaust.
Last week, I had to go to Warnambool again, so I filled up the day before, went home, then back to work, then headed off to Warnambool.
The total dte and km travelled combined just kept climbing. The highest it reached along the way was a massive 997km!!!! I was pushing for the 1000, but it wasn't to be. Maybe if I'd done the trip straight from filling up, rather than going home first. That week I filled up having done 720km, with the dte still showing about 70km.
So, (after all that ramble!), I was wondering what is the highest combined dte and km travelled you guys have seen?