Originally Posted By: AuthorEditor
The problem is that I have read and experienced that WD40 eats away at some O-rings, like the ones that probably seal your O-ring chain. Plus, WD40 doesn't provide much lubrication once it has evaporated like the Dupont stuff does.
From all reports of user tests that I have come across, WD40 does not "eat" o-rings at all.... that seems to be an old myth. The WD40 website itself states that it is fine for rubber items. Different motorcycle forums have a number of motorcyclists who have used nothing but WD40 for 20k - 25k miles without problems. I read a post by one user, I forget the website, who deliberately soaked o-rings in WD40 for a month to see if there was any problems, and he found none.
But you make a good point about its lubricating properties. WD40 is a mild lubricant at best and does't seem to last long. OTOH, it seems to make a great cleaner. I think the topic of using WD40 exclusively for chain maintenance is up to user preference and experience. Some people seem to do fine by it, a lot of people don't like the idea. I have not read any reports of any motorcycle chain that had a definite problem related specifically to the use of WD40. Anybody with any concrete infomation, please chime in.
Vic