Originally Posted By: KCJeep
OVer decades of use I will tell you a decent 10w30 works tremendously well in about anything you can find to pour it in. But with today's oils the 5w30 is better than ever and has pretty much taken over that spot.
I agree with this but would like to point out that within brand the 10w-30 is going to have a lower noack and less VII than the equivalent 5w-30. The 5w-30s are very good, but the 10w-30 does offer some benefit in places where temps stay above 0F