I looked at teams with at least 15 bowls over their school history.
65 teams total. Of those, 55% had a losing record in their bowls. 37% had a winning record. 5 teams were .500
Notable teams (winning %)- TX, Tenn, USC, Penn St, Ok St, Okla, Miami, LSU, Geo, Fla St, Aub, Ala, Iowa, Syracuse
Even notables- Florida, Baylor
Notables (losing %)- BYU, Clemson, Wisc, Wash, VgTech, UCLA, TxTech, TCU, TX AM, Stanford, S Carolina, Ark, Pitt, Oreg, Ohio St, Notre Dame, Nebraska, Missou, KSU, Michigan, Michigan St, Colorado.