D, I respect your opinion, I was just expressing mine. I didn't say that Penrite was no good, what I said was that I believe 90 w or 140w gear lube is better... if you can use it. But another point I live with is that just because they label it and market it doesn't mean it is good for you. Just for conversations sake, if you look at Penrite in the bottle, it is so thick that you can hardly get it out of the bottle. Now just imagine that same stuff in your idler box or steering box, in its natural state how much of it can you imagine is really getting around the bushings. If you have ever taken an idler box apart you can see that the top of the shaft which is machined with a flat surface just under the box cover. The top of the shaft has a rather small hole which is bored down thru the shaft and then exits on the side of the shaft into an oil/lubrication groove in the top bearing. How much Penrite or any other zero weight lube do you think can flow down that shaft and unto the lubrication groove. Then how much of it do you imagine can reach the bottom bushing. You can hardly push the stuff through there under any kind of pressure let alone pour it in. That is why I decided to put a zerk fitting on the side of my idler box. From the center of the box to the hollow area of the shaft between the two bushings, I can at least push some kind of grease to both bushings. I bought a dedicated grease gun just for zero weight oil and decided to push the stuff with my grease gun as hard as I could to see if the lube was getting to both bushings. I pushed hard enough that I then saw the stuff come out my bottom seal. I also removed the top plug and screwed it back in very lightly and also saw the stuff come out around the threads of the top plug. I would say that then the top and bottom bushings were both lubed. Now the steering box has some space in it and if you move the wheels back and forth you can inject quite a bit of the zero weight oil into the box with a large cooking style syringe. Then considering the thickness of the zero weight oil(very thick) it does not pour. After a few operations of the steering box can you imagine that the stuff is pushed out of the contact areas of the peg and worm gear. I can imagine that, and if it is pushed away what can you imagine would push it back into the contact areas. Nothing that I know of unless you routinely keep forcing new stuff into the top then you would probably get more stuff around the contact areas. So I still think that 90 to 140 weight gear lube would provide better lubrication of steering & idler boxes. Since I'm an old timer, i remember when ( '50s & 60's) it was an old back lot trick to push grease into a bad steering box to try to make it operate smoothly for awhile without leaking. This was done at times when the car was going up for sale or the owner couldn't afford to repair the steering box. It lasted for a while.