Try candle wax, that is what I use to lubricate slides on cabinet drawers.

I have no clue.  I am waiting for Barbara Todaro to chime in on this one. 

My response would be coconut oil ... but I use that for everything 

I'm not sure what you would want to use, but I do recall a window guy telling me never to spray WD-40 on them.

I like Silicone spray....

Did not know that storm windows were used in your part of the country, I dont lubricate mine, but if I did I would use the silicon spray.

Long time since I had that type of window. I do like a few suggestions to use candle wax/paraffin 

Fred, I have tried soap before and it works OK.  

Funny you mention this but we just got back from a listing 30 minutes ago and I used vaseline petroleum jelly on the tracks and that works very well.

Just dab some on your finger and rub it on the tracks and work the window or sliding aluminum screen door back and forth a couple of times and it works very well.  This lasts much longer than using the soap.

I find paraffin wax does the trick.

maybe it's time to replace the aluminum with white vinyl windows.... triple pane tilt ins .... single or double hung.... no one ever puts down the top window anyway....

What a good question Fred. I want to know too

Graphite may be a better long term solution

Fred,

Silcone spray in our opinion.  

Oh, great question, Fred!  I would use silicone spray but, will stay tuned for the expert's answers! 

I just read where someone said that WD40 was not the way to go. Also not graphite. I use a candle or bar of soap. I'm sure someone will say that's not good either.

Use something that doesn't get dirt and bugs stuck in it. I would look at Armour All products. Also, for a quick temporary fix, you can just take a bar of soap and rub it on the edges.

Fred Griffin - well, if it worked, no need to spend money on other products.

I've heard running a candle over the track to deposit wax.

This site recommends a graphite spray:

http://homeguides.sfgate.com/make-old-aluminum-windows-slide-freely-47718.html

I've used silicon, WD-40, oil, candle wax,  and even petroleum jelly.

Barbara wants you to spend a lot of money.

Graphite or some other non-sticky lube.

I will watch for the advice of the experts.

These pictures frames are so affordable. My remodeller contractor trashed the old ones since the aluminum leaves are too dirty to spend time cleaning it.  Get new ones.

Anything but WD40....

Here is a hint:

https://groups.google.com/forum/#!topic/alt.home.repair/3O7QWK3w80o

Parked and reading...

I would have said parafin or graphite, but there are some good ideas it seems.

Way late to the question and its outside my knowledge base Fred Griffin 

My local window expert said to buy graphite.

WD 40 I would try.

Silicone.  The candle wax will build up and stick over time.

I have no idea, but it looks like you got some good suggestions.

I have no idea!  I'd better look at the answers.....

silicone spray

I would try to graphite spray first. 

One way is to rub wax from a candle. It won't attract dust like WD40 does

Fred Griffin Clean the tracks and and use something like graphite. Be careful with what you use that in the long run will attract dirt and dust and cause the same problem.

I like the wax answers; makes sense.

No idea

I had an old timer show me how he used vasoline. He preferred it over WD40 as it turned black. Vasoline did not.

If it's aluminum, I would use aluminum lubricant.

We use both Graphite spray and silicone spray lube - we use it also on sliding patio doors in our rentals as well

Using graphite keeps any dust and dirt buildup to a minimum and requires less frequent application.. A little goes a long way roo.

Sorry, Fred...haven't a clue. Have never had one of those windows. 

Bing may give you some answers beyond those provided by various AR members.