I would use the 5w30. I have seen a few test vehicles at the GM lab have some issues with 0w40 & 0w30 oils in testing. Some engines were fine some had cam issues and crank bearing issues. A few blew on the gas dynos with the 0w30. The issue was the oil being too viscous under high temperature WOT NOT too thin.
TSO 0w-30 and a GM 6.0
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TimVipond,
Yes, I usually drive about 2500 miles per month-- or around 20,000= per year-- except in the summer. In the summer I try to ride my motorcycle as much as possible but I still use the pickup on occasion for camping, etc.
I still have 6 UPF44 flters left and then I do plan on going to the EaO64 Amsoil flter. I am going to use the EaO64 filter in my wife's Trailblazer along with the TSO and go by the OLM in that rig, which seems to utilize 10,000 mile OCI's-- about a 1% decrease in remaining life per 100 miles.
Yes, I usually drive about 2500 miles per month-- or around 20,000= per year-- except in the summer. In the summer I try to ride my motorcycle as much as possible but I still use the pickup on occasion for camping, etc.
I still have 6 UPF44 flters left and then I do plan on going to the EaO64 Amsoil flter. I am going to use the EaO64 filter in my wife's Trailblazer along with the TSO and go by the OLM in that rig, which seems to utilize 10,000 mile OCI's-- about a 1% decrease in remaining life per 100 miles.
PT1,
I'm not sure if I understand the point. The TSO 0W-30 is actually 10.4 at 100c and the ASL is 10.7 at 100c. The TSO is not as thick as the ASL at any temperature-- at least from what I have found through calculation... Perhaps I am wrong though?
Did the GM engines that blew during the test utilize Amsoil? And, if not, do you recall which brand they were running? That might be good information to have.
I'm not sure if I understand the point. The TSO 0W-30 is actually 10.4 at 100c and the ASL is 10.7 at 100c. The TSO is not as thick as the ASL at any temperature-- at least from what I have found through calculation... Perhaps I am wrong though?
Did the GM engines that blew during the test utilize Amsoil? And, if not, do you recall which brand they were running? That might be good information to have.
I have a 2000 silverado with the 6.0, I tried M1 5W30 once the noise was unbearable at start up, still noisy at start up with dino but M1 sounded like I had no oil in the engine. Good old GM cold start knock, better when oil pan heater pad is pluged in during the cold we have had the past week or so.
Well, I'd like to hear more about the details before I get anxiety about running GC, Amsoil, or M1 0W-30 in my GM V8 engine.
Sure, I would believe that somewhere, sometime, a GM LS-1 V8 engine was run on a dyno at plus 4000 rpm acceleration runs & 300 degree oil temps for many hours. And after the oil got the snot beat out of it, it thickened out of grade & became too viscous.
But this is such a low probability with the 5.3L or 6.0L truck engines, as the common driving cycle rpm range is 1500 to 2500 rpm.
Ship me 6 quarts of TSO 0W-30 & I'd be happy to run a 8-10K OCI in my 5.3L & ship a sample to Blackstone to verify that it is not thickening out of grade!
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