Since your in that position of brake bleeding, why not go BG on it? Its a service that has a conditioner that supposedly improves flow of brake fluid. We have BG services at our dealership and the seller is a douchebag. I asked him for a test cart they offer, he gave me a little pad to wipe samples on and clean off with brake dust cleaner. I threw it right back at him and said, "I wont use this" lol.
2009 Cobalt LS XFE U74
Mods: K&N Typhoon Intake, Option Cat-Back Exhaust, Cosmo Short shifter, Maxxim Ahead 17X7's, MPx shorty antenna, FE5 Strut/shocks, Tein S Techs, Moog endlinks, Moog spring seaters, ZZP shorty header, LSJ downpipe, LNF front grille