Basically a newbie here.....I have a 763 2000 Bobcat with 415 original hours.....My hydraulic oil tank is leaking and I am told that was a common problem with this unit and that the replacements will solve this issue but they are about $400 for a plastic tank from Bobcat....is there another source? Also, I see where Bobcat recommends their hydraulic oil only and supposedly they use some additives like zinc.....Can one use another brand of hydraulic oil safely? Regards, Mike