Michigan - Saginaw County | While special "stuff" might make you feel good, just plain grease will do the job nicely. You have it right there in the grease gun and you don't have to spend extra money and fuel running to town to get something special.
New bolts are always a good idea.
Use the battery brush to freshen up the mating surfaces. Squeeze the clamps shut and straighten out the ears you bent in by over tightening.
Grease the posts and the clamps all over before clamping. That includes on the mating surfaces.
No, that will not stop the clamp from making the proper electrical contact - it will protect those contacting surfaces by inhibiting oxygen from forming oxides that creep between the mating surfaces.
And as was mentioned above do not distort the clamp by the usual farmer technique for tightening bolts - crank em down till the threads strip. I swear some of you guys are 800 pound gorillas.
All this came from a misspent youth where I wasted part of it being an industrial electrician - and in charge of the lift truck battery shop where I tended to a fleet of more than a hundred, 3000 pound batteries.
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battery corrosion