Vortec 4.3 - Best oil for frequent short-trip applications

Messages
136
Location
The Dirty South
The climate is mild SoCal. How does 5W-40 Rotella Synth do at 60F? Is it still thinner than a 10W-30? I'm thinking that a high TBN oil with good flow on startup is what I need. RM
 
Messages
22,188
Location
Colorado Springs
5w-40 Rotella is most likely going to be slightly thicker at 60 F, but it is still a great oil for the 4.3L. You really have no worries what so ever about cold flow in southern California. 20w-50 would flow fine at those temps.
 
Messages
45
Location
JAX
Mobil Delvac 1300 15w-40 or Chevron Delo 400 15w-40. Frequent short-trips is SEVERE DUTY. Change every 3K-3.5K miles. :-) neil
 
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