fillup

fill +‎ up

fillup (plural fillups)

1. An act or process of filling up; a replenishment.
   • 1866, John Wilson, Noctes Ambrosianæ

     We had slyly ordered a few gallons of punch to be brought down to the office, to give a fillup to the worthy workmen at the close of their labors...

   • 2007 February 18, Jim Motavalli, “A Self-Serve Station, in Your Garage”, in New York Times‎:

     The disadvantage of slow fillups is somewhat offset by the cost, the equivalent of $1.20 to $1.40 a gallon, Mr. Carr said.

• upfill