I don't know how many gallons you already have in the tank but 10% = 12.8 oz
per gallon!This is why I laugh at people who buy gas line antifreeze up here on bitter cold days.
(Surprised they even sell it down in FL)
And while the old solution to pollution is dilution, it might be best to drain the tank and start fresh.
Sorry you got a bum slave cylinder.
Did this come as part of a kit, or did you buy a slave by itself?
Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.