Castrol Edge Lower end 100 cst good/bad?

Joined
Jul 7, 2009
Messages
306
Location
tn usa
I looked at differences in the viscocity at 100 for m1 and edge. The edge has a much lower visc of any the other 5w30's on the lower end of the 30 range. M1's about avg. Is this good? I know the GC 0w30 is closer to a 40w via this 100 visc measurement so any ideas why edge would use a lower thickness other than maybe fuel economy?
 
Joined
Jan 10, 2008
Messages
4,998
Location
Milwaukee, WI
It's not good or bad. 30 weight is a range, and therefore some are going to be higher and lower than others. What is the application?
 
Joined
Jun 3, 2005
Messages
1,251
Location
Austin, TX
Agreed. Good for some and bad for others. I would think in a high stress situation (like towing with a 4 cyl), I would want something a little thicker. But the lower end should be good for daily driving and good fuel economy.
 
Joined
May 29, 2009
Messages
610
Location
Afghanistan
I intentionally water down the 5w30 with 1:3 5w20. especially good in the winter when i will use a group 3 5w30 watered down even thinner with 5w20. mind you, it does get cold here in the winter.
 
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