Attention: TDR Forum Junkies 
So, I'm one of the "idiots" I suppose is a good term here that decided to run the 5w-40 CJ-4 oil from amsoil in my truck. It's backwards compatible they say (for all cj-4 brands)? Sure, ok, as in it's oil.
I finally connected the dots and tomorrow's cold start will confirm my findings (I hope).
Long-ishstory: prior to winter of last year I switch to the 5w-40. It's going to be the defacto-standard one day. Might as well jump the band wagon of the 15w-40. Let me tell you, running a the 5w-40 on a cold start was night and day easy on the ole cummins (no block heater, just grids). So I stuck with it.
I noticed a puff of blue, and the smell of burning motor oil. No, not burning as in the typical exhaust fumes the motor has, The distinct smell of what a gasser smells like when it's burning oil. Same blue.
So I pulled the intake apart and check the turbo. No abnormal play in the turbo compressor wheel, no oil (or dust) in the intake side. Good, possible run-away-condition non-existent! From that point forward I check that intake side once a month, because, the exhaust still smokes blue!
As the oil got a few miles on it, the blue smoking was less and less. 5000mile oil sample good! change filter + 1 quart.
10,000 miles, soot levels high!, so I change out the oil. the next day on a cold start I get lots of blue.
Ohh Sorry folks, This blue isn't an "while idling" blue. just on throttle, or a blip.
Same story, as I get miles on the oil, the blue smoking is not there!.
Fast forward to lastnight. 85,000 miles and a long trip to make (2000 miles over all in 10 days). I changed the oil and I should of not second guessed me self, but I did another CJ-4 batch. I was pondering just getting the 15w-45 when I was ordering the oils... . This morning, it was all blue again. It clears up when the motor warms up, but all kinda of blue!
So, I tracked down some 15w-45, and a ELF7349 endurance filter and will swap out the CJ-4 for CI-4+ tonight.
Why you ask? check out the TDR main page. I wish I would of seen that a few days ago. Would of saved my self some time, and an oil change. Not to mention some cash.
I finally connected the dots and tomorrow's cold start will confirm my findings (I hope).
Long-ishstory: prior to winter of last year I switch to the 5w-40. It's going to be the defacto-standard one day. Might as well jump the band wagon of the 15w-40. Let me tell you, running a the 5w-40 on a cold start was night and day easy on the ole cummins (no block heater, just grids). So I stuck with it.
I noticed a puff of blue, and the smell of burning motor oil. No, not burning as in the typical exhaust fumes the motor has, The distinct smell of what a gasser smells like when it's burning oil. Same blue.
So I pulled the intake apart and check the turbo. No abnormal play in the turbo compressor wheel, no oil (or dust) in the intake side. Good, possible run-away-condition non-existent! From that point forward I check that intake side once a month, because, the exhaust still smokes blue!
As the oil got a few miles on it, the blue smoking was less and less. 5000mile oil sample good! change filter + 1 quart.
10,000 miles, soot levels high!, so I change out the oil. the next day on a cold start I get lots of blue.
Ohh Sorry folks, This blue isn't an "while idling" blue. just on throttle, or a blip.
Same story, as I get miles on the oil, the blue smoking is not there!.
Fast forward to lastnight. 85,000 miles and a long trip to make (2000 miles over all in 10 days). I changed the oil and I should of not second guessed me self, but I did another CJ-4 batch. I was pondering just getting the 15w-45 when I was ordering the oils... . This morning, it was all blue again. It clears up when the motor warms up, but all kinda of blue!
So, I tracked down some 15w-45, and a ELF7349 endurance filter and will swap out the CJ-4 for CI-4+ tonight.
Why you ask? check out the TDR main page. I wish I would of seen that a few days ago. Would of saved my self some time, and an oil change. Not to mention some cash.
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