trying to add or change supercharger oil

[newtomr2]

have an '88 supercharged mr2 with 205,000 miles on it. just got it last year. for the most part 7k later have fully restored it. just bought supercharger oil from toyota but there is only around 4 to 6 ounces of oil in canister. the manual never says to change this oil, just to keep it at correct level BUT the manual only goes up to 60 or 80k for service tips. should i change the supercharger oil since it has so many miles on it and if so with this 4 to 6 ounces that toyota sold me(little canister for about $40.00) do the job??? in other words...how much actually filles this thing up, the manual doesn't say and toyota corporation has no idea. PLEASE HELP