Ha yeah, you can put super thick stuff in there if you want, or you can deal with the real probelm for very little money:
Tiger Japanese Auto Parts LTD - ZC 5 Speed Transmission Honda Civic 92-95 DOHC
That JDM tranny will bolt up to your engine (as the ZC is the JDM D16Z6) and you are only out a few hundred dollars after freight. May I admonish you that while you have the tranny out of the car, also replace your rear main seal on the crankshaft so it doesn't spring a leak someday and you kick yourself.
This tranny would have 25-35k of easy driving on it, you CANNOT go wrong, but lighting $20 bills on fire here and there trying "Transmission fix in a bottle," thick gear oil, and other shitty temporary fixes- you DEFINITELY are going wrong there. Unless you are totally piss poor and you have no idea how to work on a car, just drop the few hundred bucks and set yourself up to have a ride for a long time. I can vouch for that site that they truly are LOW LOW mileage engines and transmissions and compatibility is a non-issue. Obviously replace at least your clutch plate as well, but I can tell you right now that for less than $500 you an put a new transmission in your car, and that's if you put a new clutch set and rear main in there too. more like $350 if you're really on a budget and you skip the clutch thing.
That's my two cents worth, do what you want, but I had a tranny going out and I pissed away my money trying a bottle of this, bottle of that, and I finally said fuck it and bought a whole wrecked car with a tranny, parted the car out and got my money back, AND had a transmission left over. Had I known about Tiger back then, I would've just gone that route. Good luck!