If you're pulling them apart you should try to put in springs now. Changing the oil weight will do nothing for setting up sag which I thought was what we were having issues with. Heavy oil means slower reactions by the forks. If you haven't already, try to get a hold of Ruben to get an idea of what you can/need to do if you're staying all stock up front. Hell, get a price on springs from him while your at it...they shouldn't be a lot.