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Originally Posted By: SR5 And just to add, the CK-4 Rotella 15W40 has a Noack volatility of 11.7 % which is good and a KV100 of 14.8 cSt. With the TBN at ~ 10.3 that is one strong oil. 10.3 TBN?? Am I missing something?

The economy part was more generalized for most new oils and pointing towards FA-4 which came along with CK-4. I know we could beat the Z/P requirements to death in a discussion as most "modern" diesels have no flat tappets/followers anymore but does the EPA and API have the interest at heart for...

API says CK4 is backwards compatible and better, Ford says its not.. Of course EPA pressures for better economy but is this at the expense of longevity and our pocketbooks?! Show me side by side tests comparing CJ-4 vs CK-4, not all this press material and I'll be the judge

Originally Posted By: A_Harman I only ran M1 TDT in my Cummins for a few months, and dumped it because oil consumption was higher than I was used to on Premium Blue. Then I put in Rotella T6 and have never looked back. Had the exact same result in my LBZ DMAX along with very high Cu in UOAs...

Here's a bone for those of you that use the testers for agm storage batteries. I plotted all of the 12v agm batteries from PowerSonic's data sheets for internal resistance vs AH@20hr rate and used tablecurve 2d again to find the best linear equation of the data plot. I then entered in AH values...

In case anyone is interested, I have plotted all of the resistance vs cca values from youtube videos and posts from various forums and have found a very close formula for calculating either of the two: uOhm^0.5=a+b/CCA^0.5 where a=-0.02619139 and b=54.87169871

I bought my 07 with 20k on it and my first two oil changes filled it with M1 TDT, UOA at ~10k miles, copper was VERY high. Something in the M1 TDT leaches the copper from the oil cooler. Then I switched to T6 and it went back to normal.

Originally Posted By: mobilaltima Rotella T6 5W40. And id recommend doing the DPF/EGR deletes if you havent already done it. they just came out with EFI Live for the LML's the sky is the limit when it comes to tuning them and making power!! Q - DPF, DEF, finally I can remove it all? A - Not...

I had high Cu on a couple 10k changes with Mobile 1 TDT on my 07 DMax, dumped it for Rotella T6, Cu went back to normal and consumption reduced as well. I had been a fan of Mobile 1 Synth for all my prior gas vehicles but the TDT oil left a sour taste in my mouth.

Originally Posted By: A_Harman I agree. Also, there are better 5w40's out there than Mobil's (assuming you're using TDT), in my opinion. I ran M1 TDT in my Dodge for a while and dumped it early because of high oil consumption. I switched to RT6, and oil consumption has been much less. yup...

Originally Posted By: txgp17 For a Duramax, the PPE centrifuge looks like the way to go. A centrifugal filter can catch a lot more junk than a media filter. The centrifuges work on a dmax but not near as efficiently as they should because of the reduced pressure on these oil systems LLY+...

Thanks for the information everyone.. dnewton3, I had thought the hash marks on the stick were approximately 1qt per mark, if what you say is true then I am about the third hash down now at 8k miles "1.5qts"? Thats not bad at all. From all that I've read here I know I would be absolutely fine...

I have an 07 Silverado Classic "LBZ" Duramax with 48k miles on the ticker now. Bought it when it had 20k and switched to Mobile TDT 5w-40 oil. Ran it for 10k miles, was about 3 quarts low even though this is in spec for oil consumption on these engines and had high copper count "oil cooler". At...

Originally Posted By: bullwinkle I don't know about newer, lower-mileage 6.0s-but at 232K my '04 doesn't like to start cold in general, and there is a BIG difference below 20F (unplugged) starting between 10W30 dino and 5W40 synthetic. In my case, probably the only thing I drive regularly that...

I switched my oil from the original owner's 5k OCI of Rotella 15w-40 at 20k miles to M1 TDT 5w-40. After 10k miles I changed and sent in smaple to Blackstone. I had 554ppm Cu! My 30-40k mile change had 125ppm Cu, still high but falling rapidly. I think the add pack in the M1 probably cause alot...

Originally Posted By: LS2JSTS Who is "we"? And have you had the substance you are finding 12-24 inches deep, into a lab to have it tested? I've wondered the same.

Originally Posted By: D189379 Originally Posted By: hate2work Originally Posted By: salesrep Nancy Grace? I don't get it. I was just trying to say your title was a little dramatic, that's all +1. I was expecting some awesome story about the bus running completely dry of oil and the driver...

That would make sense.. run some of the [censored] oil "supertech", add the mystery substance then see an amazing improved difference.