I am in the process of installing polyurethane bushings on my car and I have a grease question. The bushings didn't come with nearly enough grease, so I bought some "Sil-Glyse" grease from NAPA. Most of my front bushings were greased using this. I then found out that, although it contains some silicone, Sil-Glyde is primarily polypropylene glycol and polypropylene glycol is a petroleum product. Supposedly, one should not use petroleum based grease on polyurethane bushings.
So here are my questions:
Do petroleum based greases chemically "erode" Polyurethane as some have suggested?
If not, is there another reason that it would be a poor choice for this purpose?
I have the whole front end back together and torqued at this point, in your opinion, is it worth it to take everything back apart and re-grease using a silicone based grease?
I know that questions regarding poly bushings and grease have been asked here before, but I found no answer to the specific questions that I asked.
So here are my questions:
Do petroleum based greases chemically "erode" Polyurethane as some have suggested?
If not, is there another reason that it would be a poor choice for this purpose?
I have the whole front end back together and torqued at this point, in your opinion, is it worth it to take everything back apart and re-grease using a silicone based grease?
I know that questions regarding poly bushings and grease have been asked here before, but I found no answer to the specific questions that I asked.