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I pulled the very first oil sample on the 2015 EcoDiesel. I was very happy with the results. There's only 5,368 miles on the engine oil, but the oil spent 8 months in the engine. That's a lot of idle time, cold starts, daily short commutes, and some towing. The T6 lost approximately 50% of its TBN capacity as it dropped from 10.6 to 4.91, which isn't a surprise. T6 uses a softer base oil which doesn't hold up to oxidation like a better-quality oil, but it still protected the engine for this type of interval.
 

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Coincidentally my 130,000 mile Blackstone UOA showed up a few minutes ago... I know some of my info still on it, no sweat. Last time I did a TBN it was 5.1 at 10,000 mile interval , btw with T6.
 

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Coincidentally my 130,000 mile Blackstone UOA showed up a few minutes ago... I know some of my info still on it, no sweat. Last time I did a TBN it was 5.1 at 10,000 mile interval , btw with T6.
Thanks for posting. 5.1 TBN is good for 10,000 miles. You must do a lot of highway driving?
 

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Thanks for posting. 5.1 TBN is good for 10,000 miles. You must do a lot of highway driving?
@biodiesel , I'm in rural Maine so no short trips, but very little high speed highway, mostly 45-55 mph and a fair bit of heavy towing. I never see really high oil temps. Use winter front from October to April. Just took it off. I'm pretty anal about oil changing and testing, but for me the T6 seems perfect. Kinda like Scotch, the $100+ a bottle single malt is really great, but I can find one for less that is just as good...
 

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@biodiesel , I'm in rural Maine so no short trips, but very little high speed highway, mostly 45-55 mph and a fair bit of heavy towing. I never see really high oil temps. Use winter front from October to April. Just took it off. I'm pretty anal about oil changing and testing, but for me the T6 seems perfect. Kinda like Scotch, the $100+ a bottle single malt is really great, but I can find one for less that is just as good...
Based on what I'm seeing, T6 is protecting your engine under your driving/environmental conditions. In your most recent oil analysis, the viscosity shows the oil dipped into the 5W-30 range. The cST should be greater than 12.5 and your report shows 12.2. Blackstone said the values should be between 11.9 - 15.3, so you're technically still okay.
 

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Based on what I'm seeing, T6 is protecting your engine under your driving/environmental conditions. In your most recent oil analysis, the viscosity shows the oil dipped into the 5W-30 range. The cST should be greater than 12.5 and your report shows 12.2. Blackstone said the values should be between 11.9 - 15.3, so you're technically still okay.
First thing that I saw! Blackstone seems ok with it, so... Here is a test that was posted on the Ford 3l PS forum. Just for a comparison 5w30 Ford spec oil.
 

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First thing that I saw! Blackstone seems ok with it, so... Here is a test that was posted on the Ford 3l PS forum. Just for a comparison 5w30 Ford spec oil.
Blackstone knows that a thick 5W-30 still offers protection, but the oil has fallen out of spec. At 10,000 miles, you're running a 5W-30 oil. I wish Blackstone reported TBN and Oxidation values. My T6 cST was 13.4 and my TBN was 4.91 at my interval. Oil usually thickens as it ages, but sometimes fuel dilution thins it out. We'll see what your next report shows.


 
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Well, I have the little message that pops up when the regen takes place and I don't recall it happening immediately prior to taking the sample when I drained the oil. I do know the "new" program from Gr&&n Di&s&l regens more often than the original version.
It's possible the truck regened just prior to the oil sample and didn't get hot enough to evaporate the fuel in the oil.
 

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Not sure what is up with fuel dilution, but I hope the next sample is better.
Are you using a fuel additive on a frequent basis?
 

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I do know the "new" program from Gr&&n Di&s&l regens more often than the original version.
The GDE EPA Compliant Tune actually regens less than the factory tune. Factory tuning doesn't display every regen whereas the GDE tune (with regen display monitoring) allows you to see every regen.
 

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The GDE EPA Compliant Tune actually regens less than the factory tune. Factory tuning doesn't display every regen whereas the GDE tune (with regen display monitoring) allows you to see every regen.
I'm comparing the OG HOT with the 'compliant'

I only had OE tune for a few miles and the AEM tune for about 21 miles.
 

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It's possible that you have a dirty/sticky injector which could cause poor fuel atomization or the injector to leak. Run a full bottle of Diesel Extreme to see if it resolves the issue.

 
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@Top, your oil report says it was taken May of 2021 with 97,000 miles on the odometer. Is that an error?
 
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