Hey, (just for fun) check this out: Bardahl NoSmoke. The link has a table comparing cold cranking, MRV, and 100C viscosities of regular oil, No Smoke, and the mix, as well as other stop smoke products.
http://www.bardahl.com/automotive/products/nosmoke.htm
Bardahl claims to be the thickest and the original. Doubles the viscosity of a 10w30. By itself has a 1050 cSt at 100 C.
I only wonder what kind of sludgy mess these oil thickeners sheer back to over time?
Oh yeah, they also have "NoSmoke with Sludge Guard" and "NoSmoke with Stop Leak and Sludge Guard."
It's gotta be good because "Major vehicle manufacturers such as Fiat, Lancia, Mazda and Daewoo accept No Smoke as an effective means of control oil consumption and related emissions."
[ August 18, 2004, 12:06 AM: Message edited by: TallPaul ]