best conventional for winter

Messages
174
Location
Phila., PA
I use 5W-30 full synthetic year round. My brother refuses to run synthetics fearing oil leaks, his engine(5.4L V8) has 65K miles.....any suggestions on a DINO which has better cold weather pour stats for the winter months?, thanks [I dont know]
 
Messages
700
Location
USA
Best : Pennzoil 5w-30 ccs is 5400 at -30c pours at -44f Better : Mobil 5w-30 ccs at 5500 at -30c pours at -39f Good : Chevron 5w-30 ccs at 5700 at -30c pours at -33f
 
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