Well depends it is synthetic or not. A petroluem 10W-30 starts to harden even at about 25*F. A good synthetic 10W-30 will still be good down to about 5*F with original fluidity. The wax crystals in regular oil cause the winter abilities to drop alot. Synthetics naturally have better cold start properties.quote:
Originally posted by haley10:
Most top brand 10W-XX should be fine to zero F.
What is recommended and what do you have in there now??
Did you have a slow start or something???
But if at all possible, try to use a 5W or lower becuase you can only benefit from it even if you will never see temperatures belowe 0*F. Shear stability isn't really a big issue with synthetics anyway.
So i guess my real question is what kind of oil are you using??