NG900 & OG93 |
Vintage Models |
Clubs & SOC |
Other Cars |
Books Movies & Music |
Member Photo Galleries |
Member Directory |
*Buddy Registry |
*Mileage Registry |
What's New |
Photo of the Month |
Even -40C rated stuff will frost over at -10C. It has something to do with wind, but not wind chill. The solution is just that, a solution, aka a mixture of water and methanol (ok, and a dye). There is no chemical bond between these two components. If they remain in solution, I'm sure the -40C rating would be correct. When you spray a thin film onto a windscreen with a lot of air rushing past it, the methanol is going to evaporate much faster than the water. What water is left behind after the methanol evaporates can freeze on the windscreen (and it can also sublimate pretty quickly, luckily). Bottom line, if you have a choice between -20, -30 or -40 rated, get -40 every time, unless the ambient temperature is above 0C (32F), in which case it doesn't matter.
Posts in this Thread:
Post a Followup
No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.
This is a moderated bulletin board - Posting is a privilege, not a right.
Unsolicited commercial postings are not allowed (no Spam). Please, no For Sale or Wanted postings, SERIOUSLY.
Classifieds are to be listed in The Saab Network Classifieds pages.
This is a problem solving forum for over 250,000 Saab owners, so expect to see
problems discussed here even though our cars are generally very reliable. This is not an anything goes
type of forum. Saabnet.com has been a moderated forum since 1988. For usage guidelines, see the
Saabnet.com Mission and Purpose Page. Please remember that you are
not anonymous. Site Contact | Site Donations | Other Sites by SP -
Your address is: 18.104.22.168 - Using CCBot/2.0 (http://commoncrawl.org/faq/) - Logged.