Oil recommendations for 65K mile '99Chevy 454 Suburban

Messages
3
Location
Georgia
'99 Suburban 2500 with 7.4l vortec. 65,000 miles, runs smooth as glass but I have no idea what kind of oil its had. Any recommendations? Location is Georgia. Thanks in advance
 
Messages
34,038
Location
Southern NJ
Here would be my choices. 1. Amsoil 5w/10w-30 2. Delvac 1 3. Amsoil 15w-40 AME I think these are all the top values in oil right now. Just my opinion. [Smile] If this is a deisel engine, go with #2 or #3.
 
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