If it was meant to be re-greased they would have installed a zerk fitting for that purpose. I would be hesitant to even put grease there for fear of contaminating and damaging the rubber bushing.
This isn't how suspension points with rubber bushings work. When this bolt and associated nut is tightened to spec, it clamps on the subframe point which clamps on the bushings crush tube or as you called it the metal sleeve. As the suspension travels up and down, the rubber flexes accordingly and tension is created during compression and droop. The bushing wants to "spring" back into it's normal position. That's why it is important that suspension points are tightened at normal ride height/suspension loaded. This is normally achieved with that end of the car on ramps.Consider the front lower control arms. They are meant to move up and down as the vehicle travels along. The main pivot point is the front bushing where the arm is bolted into the frame. The rubber bushing is pressed into the arm and has a metal sleeve through the middle. The bolt passes through the sleeve and frame. So the bolt acts like a hinge pin.
How, if at all, should this bolt inside the sleeve be lubricated? It's metal to metal, and there's no grease fitting. I am installing new control arms, so I have a chance to lube this, but with what? Once it's on, it's not easy to re-grease, so what would you guys use here as a "permanent" lube? Or would it be a job for anti-seize? I'm not really afraid of it seizing, but want to minimize metal on metal wear and noise.
Yeah Silicone is what I've always heard recommended on rubber parts, or in this case, bushings. As Theseus (have an old Saturn that's encroaching on that namesake) said, it won't last long, but I think it does help new metal on rubber parts, like an anti-sway bar, slide and settle into place as they break in and help avoid pops and clunks. Control arms usually have a fixed sleeve inside the bushing, so there's never any real metal to bushing action. Anti seize is good to keep that sleeve from becoming one with the mounting bolt, but it won't necessarily help the bushing.For the rubber bushings, silicone grease is fairly safe but won’t last either.
I'm curious what specifically MOOG has done to cheapen their products and what Subaru did to update theirs. MOOG has a lifetime warranty.Lithium grease is not an anti seize grease for metal to metal fasteners. First, it won’t last. Second, any water content will hasten corrosion. Copper anti seize will last much longer.
For the rubber bushings, silicone grease is fairly safe but won’t last either.
The best approach is to use a quality part. I’d stick with Subaru oem lca. The part has been updated. Moog and other aftermarket LCAs have gone down in quality and probably will not last longer than oem.
I have to disagree. Having used Molykote anti seize lubricants like M1000 and others, I have to see that they actually do prevent corrosion on fasteners.Actually anti-seize doesn't go very far to prevent rust and corrosion. It is basically a very fine metal powder mixed with some oil. You put it on threads, for example, and assemble your parts. The very fine powder remains in the threads and when you go to disassemble the threaded assembly, the powder shears more easily than rusted or corroded parts. You don't have to "break" the rust to get your bolt out.