Re: Left Rear Sway Bar Support Bolt Broken Off (55 Packard 400)

Posted by PackardV8 On 2007/3/26 21:21:13

Certainly, rubber products should not be soaked or exposed to oil or grease for extended periods of time. HOWEVER, i have repeatedly coated/wiped/cleaned nearly every rubber part on many various older vehicles over the years with superb results. The rubber around the windows and door seals were getting hard and beginning to show some cracking on my original Executive some 8 years ago when i bought it. Over the last 8 years i've mopped 10W-30 on them maybe once every two years and they are now relatively pliable and new looking.
In fact, doing so is a very time consuming job. I've tried all of the silicones and rubber dressings and polishes but they seem to be only a temprary cosmetic improvement. Again. i've used the 10W-30 for many years across many different application and NEVER with any negative results and on things that i have owned for many years and even decades.

THe 10W-30 seems to be the best. Streight weight engine oil or 20w-50 or 10-40 none seem to be as effective as the 10w-30 when applied at temps above 70 degrees F.