I have a 2005 Sportsman 400, the only thing I think needs or has grease fittings are the two front hubs and the sliding drive shaft. Even though they call for different lubes in the manual, I was told I could use synthetic grease in both…Any suggestions. Will any synthetic grease work….I hate to spend $20 on a tube of Polaris, when I could get a tube at an automotive store for half the price.