Then it looks like running the oil at its worst level of condition for the last 1/3 of the drive is the winner!! I stand corrected...I'm glad I'm an old dog LOL peace

Seriously you're worrying about saving $10 and 10 minutes. I get what your saying but why not just change both qts every 5-10 hours then?

I not worrying about saving oil, not at all, just getting rid of the worst oil in the drive which is at the bottom of the drive and anything heavy in the hot oil ( i.e. metal particles) will settle between uses, drain the worst oil out and replace with new oil at the top. Sure changing out all the oil every 5 to 10 hours is better then 30 to 50 hours, but that be over kill, but then again it might be a lot cheaper in the long run? It just sucks that the drives don't have any filtering on them and that is the main reason to make up for the lack of oil quality during length of a service intervals.

OK let's really put this all in perspective--- Here's the question that pertains to almost every engine out there--

Would you get on an airplane and hurl yourself thru the atmosphere in that little tube of toothpaste at 40,000 feet around 600 mph with 2 to 4 engines that NEVER had their oil replaced but only had there fluids added to??

only you can answer that question

3pointstar

I do not agree. A filter would be nice of course, for removing damaging metal particles and such,but that's not going to keep the oil like new in this particular use. Not by any stretch.

Are you really that cheap that you won't spend 30 bucks to change your drive lube??

Not every 5-10 hours!! I change mine once a season. 40-50 hours. Engine oil gets changed 2-3 times per season.

Do what zgoo is talking about on geared escalator drives and these drives last 20 plus years.

525s XRs. Change mine every 20 hours with the engine oil.

I get the OP point, just not for me.

I reread this whole thread and it does make sense. It's also real easy to just drain until the reservoir is empty and then fill the reservoir. No messy around with an oil pump. So would it be better to do this every 5 hours then to change all of the oil at the end of the season at 45 hours......?