Originally Posted By: Garak
I'd lean more towards something like the Defy, but Loobed's suggestion of 5w-40 Rotella is definitely worth considering. It'll be a bit thicker, yet you won't sacrifice a bunch of cold weather startup protection, either. You also won't be short of zinc.
Or TBN
2 VOA for Rotella 5w-40
http://www.bobistheoilguy.com/forums/ubb...rue#Post2566898
http://www.bobistheoilguy.com/forums/ubb...rue#Post2501235
LoganC: I can''t remember what weight oil to use for the different ranges of bearing clearances.You should go to www.chevytalk.com (since you have a c-10) and ask in the "performance" section which oil grade you should use for the bearing clearances you have. Don't worry about which brand to get: The grade is more important (the second number such as 10w-40). The first number is for when it is cold. A lower number usually means oil will get to where it needs to be faster when you first start your cold engine.
For .002 I am going to guess a xw-30 weight, but I still think 5w-40 would also be good. A good 10w-30 would be either Valvoline MaxLife or QS Defy. There hasn't been any UOA for Defy, so nobody really knows how it will perform. MaxLife usually always shows a good UOA.
I'd lean more towards something like the Defy, but Loobed's suggestion of 5w-40 Rotella is definitely worth considering. It'll be a bit thicker, yet you won't sacrifice a bunch of cold weather startup protection, either. You also won't be short of zinc.
Or TBN
2 VOA for Rotella 5w-40
http://www.bobistheoilguy.com/forums/ubb...rue#Post2566898
http://www.bobistheoilguy.com/forums/ubb...rue#Post2501235
LoganC: I can''t remember what weight oil to use for the different ranges of bearing clearances.You should go to www.chevytalk.com (since you have a c-10) and ask in the "performance" section which oil grade you should use for the bearing clearances you have. Don't worry about which brand to get: The grade is more important (the second number such as 10w-40). The first number is for when it is cold. A lower number usually means oil will get to where it needs to be faster when you first start your cold engine.
For .002 I am going to guess a xw-30 weight, but I still think 5w-40 would also be good. A good 10w-30 would be either Valvoline MaxLife or QS Defy. There hasn't been any UOA for Defy, so nobody really knows how it will perform. MaxLife usually always shows a good UOA.
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