Mobil Oil is weighing a proposal to sponsor an indoor track meet at Capital Centre in Landover, Md., next Jan. 8.

Mobil, which provided considerable financial support for the U.S. Outdoor Track and Field Championships here, also furnished the money for the Grand Prix payments to clubs based on athletes' performances in specified events.

Mobil will conduct a similar Grand Prix involving at least 10 indoor meets next winter. It would like to use a Washington event to kick off the circuit and asked Bob Comstock, founder and longtime director of the defunct National Invitational Indoor meet, to provide cost figures for such a venture.

Comstock attended Sunday's meeting here of the Indoor Track Meet Directors Association and applied for a tentative Jan. 8 date.Although the site specified in the minutes of the meeting was College Park, Md., home of the National Invitational, the plan is to move into Capital Centre.

Because of the different dimensions of the Centre and Cole Field House, it would be necessary to purchase a new track, since reworking the old Cole track is not feasible. Centre officials said the Jan. 8 date presently was reserved for hockey, but there was sufficient time to make a change before the National Hockey League schedule is finalized.

The Centre event would be a showpiece, probably televised over the Public Broadcasting System, and featuring a 2 1/2-to-3-hour package of top-flight individual competition.