I have an older EZ Loader trailer that I'm going to convert from spring axle/grease bearing setup to torsion axle/oil bath setup. I talked to the EZ Loader dealer in Garibaldi (Greg's Marine) and they suggested I go for it. I noticed their new trailers have the oil bath system. Seems like a lot less maintenance! I have the setup on my work bench, waiting for good weather to install it.

 

I put the oil bath hubs on my trailer. No problems with them so far. I have the same setup on my motorhome and have never had any issues with oil bath bearings.

 

There's a lengthy thread on ifish somewhere that discusses this in depth. Seems that if you hardly ever use the trailer oil bath might not be so good, but if its always on the go oil bath is great, but there were so many posts you should look it up and see what all the experts said.