The Toro Rossos weren't that bad either.
Considering a 100kg fuel limit, and the race being more or less 1 hour and a half long, even with the second formation lap and the pace car you'd use around 66kg/h on average.
So even if Ricciardo's car went over 100kg/h (and I doubt it was a high amount, perhaps 10kg/h or so at the peak), he would have had to save fuel for a longer time than the other cars.
So overall race time would have been more or less the same. You could argue that without those higher consumption peaks (and therefore power) he might have been passed by some cars (Magnussen, perhaps more in the first few laps), but with his pace, he could have gotten ahead with tyre strategies.
TL;DR: I don't think he gained any race pace with this, at most a position to Magnussen.
[tinfoilhat]Unless...Red Bull have fitted a hidden fuel tank and they used way more than 100kg.[/tinfoilhat]. Unlikely, since it would be easy to see in the telemetry, if someone used more than 100kg.