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#4312676 - 01/25/17 08:15 PM Rotella T 15W40 30,000 Kms On 93 Cummins 6bt
A310 Offline


Registered: 04/16/15
Posts: 256
Loc: Kelowna, BC, Canada
Here's my latest oil analysis done on the trusty Cummins. I Changed out the PuraDyn TF24 for the MTS24 unit at 19000 Kms which required 3 ltrs of oil and an additional 1 ltr top up. No oil change was performed just an oil sample taken. Here's the report:


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#4312690 - 01/25/17 08:36 PM Re: Rotella T 15W40 30,000 Kms On 93 Cummins 6bt [Re: A310]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4250
Loc: Houston, Texas
I wonder how you guys get the tbn to last so long. My tbn is down to like 3 or 4 after maybe 6,000 miles.
_________________________
2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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#4312692 - 01/25/17 08:36 PM Re: Rotella T 15W40 30,000 Kms On 93 Cummins 6bt [Re: A310]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4250
Loc: Houston, Texas
I honestly wonder if blackstone is accurate with their tbn, I mean it's starts at 10 to begin with.
_________________________
2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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#4312708 - 01/25/17 08:54 PM Re: Rotella T 15W40 30,000 Kms On 93 Cummins 6bt [Re: A310]
A310 Offline


Registered: 04/16/15
Posts: 256
Loc: Kelowna, BC, Canada
It's slow decreasing, so I'll be adding an oil guard in front of the Puradyn to combat the decrease. I'll be changing the oil guard filter every 3000 miles and 1 ltr of top up oil added. Are you running a bypass?

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#4312769 - 01/25/17 10:43 PM Re: Rotella T 15W40 30,000 Kms On 93 Cummins 6bt [Re: A310]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4250
Loc: Houston, Texas
I haven't analyzed my oil in a while, but IIRC correctly I was running a fleetguard stratapore oil filter. Been using using the Donaldson for a long time now, comes from Arizona, so no rust or defects like I was having with several fleetguards.
_________________________
2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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#4312861 - 01/26/17 06:19 AM Re: Rotella T 15W40 30,000 Kms On 93 Cummins 6bt [Re: A310]
ChiTDI Offline


Registered: 12/19/03
Posts: 2193
Loc: Chicago IL
The dates and miles don't match.
Was there a typo?

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#4313014 - 01/26/17 09:34 AM Re: Rotella T 15W40 30,000 Kms On 93 Cummins 6bt [Re: motor_oil_madman]
m37charlie Offline


Registered: 06/08/09
Posts: 1333
Loc: Alaska
Originally Posted By: motor_oil_madman
I wonder how you guys get the tbn to last so long. My tbn is down to like 3 or 4 after maybe 6,000 miles.

Your engine has EGR, unless deleted. The OP's does not. EGR causes increased acidification of the oil even though tailpipe NOx emissions may be decreased.
Also he had 4qts makeup oil, about 1qt/5000mi.
Charlie
_________________________
05 Unimog U500/Unicat camper/Delvac 1 SHC ACEA E4/E5
09 BMW X5 35d/Delvac1 LE 5W30
88 Toyota OJ50LV OM314 motor D1 SHC
52 Dodge M37/Hercules diesel


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#4313957 - 01/27/17 10:42 AM Re: Rotella T 15W40 30,000 Kms On 93 Cummins 6bt [Re: ChiTDI]
A310 Offline


Registered: 04/16/15
Posts: 256
Loc: Kelowna, BC, Canada
Originally Posted By: ChiTDI
The dates and miles don't match.
Was there a typo?


Yes was a typo at 18000 kms, it's date is supposed to be Feb 9,2016. All other dates are correct.

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#4326516 - 02/11/17 10:00 AM Re: Rotella T 15W40 30,000 Kms On 93 Cummins 6bt [Re: A310]
NStuart Offline


Registered: 12/28/16
Posts: 278
Loc: Sav ga
Interesting you may want to check my post above yours "used and abused" I just changed out 40000 mile Rotella T6 on one truck and just swapped out 16000 mile Mystic on the other. Just installed Donaldson blue filters and Amsoil bypass kits on both trucks and changed over to Schaeffer's Oil. One of the trucks got wrecked and it is in the body shop right now which means the other one is running 24/7 for the last 3 weeks which equates to 6500 miles of hard short local 20 mile runs pulling 82k lbs, the next time I sample things should get interesting
_________________________
Detroit14l 1m75k mi bp schaffer9k 30k oil
96 ram 5.9 gas 80k built tranny 5k m1
85 cj7 4.2 performance build. Schaeffer 9000
08 cbr600rr graffiti. T6

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#4326519 - 02/11/17 10:01 AM Re: Rotella T 15W40 30,000 Kms On 93 Cummins 6bt [Re: A310]
NStuart Offline


Registered: 12/28/16
Posts: 278
Loc: Sav ga
Is this a work truck or daily driver
_________________________
Detroit14l 1m75k mi bp schaffer9k 30k oil
96 ram 5.9 gas 80k built tranny 5k m1
85 cj7 4.2 performance build. Schaeffer 9000
08 cbr600rr graffiti. T6

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