Ok, so I'm a newbie here and relatively new to CRD ownership. I have had mine a year and put about 23,000 mi on it in that time.

OEM specs Mobil 1 0W-40. Everyone here is using 5W-40. I'm confused what is the benefit of using a different grade? Should I be using 5W-40?

Is the factory recommended change interval of 6,500 mi just a BS number? Can I safely run 10,000 - 12,000 per change?

Please help...I'm now thoroughly confused!!

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2005 CRD Liberty Limited
Dark Kahki
EHM, Rancor 245R, Cummins Lift Pump

1978 Jeep CJ-5
Blue Metalic
3" Lift
T-18 Transmission (4 spd w/ granny)
One piece Mosser Rear Axles
Rebuilt V-8 305
Soon to be Frnt & Rear Ox Lockers (Hopefully)

I think most people here use 5W-40 because it is easier to get and cheaper. Plus the owner's manual states that 5W-40 is OK if 0W-40 is not available. Just make sure it's synthetic and designed for a diesel engine, like Mobil 1 5W-40 TurboDiesel Truck or Shell Rotella T synthetic. (Blue bottle)

I was running 5,000 miles between changes, then I got an oil analysis from Blackstone. They recommended I extend to 7,000, but I just did my last one at 6500. I wouldn't run it out to 10K, personally. Just too risky when it is so easy to change the oil and the filter on the CRD.

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In this war of lines, so many have been crossed. Where will it all stop?

2006 Deep Beryl Green CRD Sport *SOLD 1/22/12*
Provent, V6 Airbox, Fumoto, Samcos, GDE ECO & TCM Tune, Euro JK TC, Magnaflow Catback
245/70/16 Destination A/T's
Boiler's Radiator Skid Plate
Jeepin' By Al 2.5 inch Adjust-A-Strut Lift, JBA Gen 4.5 UCA's (6/5/10)

The mobil 1 0W-40 is really a gasoline engine motor oil. It's not the best choice for diesel engines. The two oils mentioned in the above post are what most of us are using because they are diesel rated (CI-4+ or CJ-4). Several of us run a 10k mile change interval with good results.

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05CRD: GDE Hot ECU & TCM tunes, Provent, Cat filter, Facet lift pump, TransGo kit, Florida TC, Samcos, stainless brake lines, HDS thermostat, Renegade light bar,
RL super sliders, Bilstein adjustables, Al's Gen 4.5 Arms, 235/85-16 Duratracs, DTT rear, Elocker front, EVIC+TPMS, Turbo timer, McNally pillar gauges, Weeks Stage II kit.

I run all my diesels to 10k+ or 1 year. I use Amsoil, 5w-40 Euro synthetic in the CRD. Never had an analysis done. How much does that cost any ways?

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2006 LTD Bright Silver loaded with all the needed mods, CCV intact.
Proudly supporting CRD vendors, and their development of quality parts and accessories.
Equipped with HDS thermostat, plenty of heat, faster warm-ups, increased fuel mileage.

There you go

http://www.blackstone-labs.com/free-test-kits.php

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Horse Power: How fast you hit a wall.
Torque: How much of the wall you take with you.

06 CRD
OME HD w/clevis top plate
JBA 4.5 UCAs
245/75/16r Goodyear Duratrax
Fumoto Valve, V6 ABM
Rock Lizard Super Skinks
Cobra 75 WX ST
ECO GDE tune, 2.5 straight piped
ProVent, Samcoed
Non F37ed TCM
DieHard P1

Mobil 1 0W40 is recommended for diesel engines.


http://www.mobil.com/usa-english/lubes/ ... _0w-40.asp

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06 CRD LTD ( Euro )

wow, 22.50 for the test and 30 for the pump:shock:

Currently at the CAT dealership I work for, the oil sample pump (1U5718) is 24.06 and an oil sample bottle (sos-reg) is 13.10...... The great thing about our samples is they already have the tubing in them and the price of the bottle includes testing.

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2008 KK Liberty Sport NIGHT OPS EDITION + GILLS
OEM & Custom Skids - Factory Tow Package - Rock Lizard Skink Super Sliders
Prototype JBA 4 Inch Lift - JBA UCA's - Flowmaster Super 44 OR - Whacked Resonator
Jet Stage 2 - RL Gecko Basket Rack - Custom Winch Bumper - Recon 10.5K Winch

I could be wrong here, don't see the CI-4 or CJ-4 rating

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06 CRD LTD ( Euro )

I'm with you.... yes it may meet MB and VW specs, but in my mind, those are light duty diesels while the Lib is a medium duty beast

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2008 KK Liberty Sport NIGHT OPS EDITION + GILLS
OEM & Custom Skids - Factory Tow Package - Rock Lizard Skink Super Sliders
Prototype JBA 4 Inch Lift - JBA UCA's - Flowmaster Super 44 OR - Whacked Resonator
Jet Stage 2 - RL Gecko Basket Rack - Custom Winch Bumper - Recon 10.5K Winch

You don't have to use the pump to do a sample for a UOA with Blackstone. They actually recommend waiting till your normal change interval, running the vehicel out on the highway for a little while to get it to operating temp (not just idling it) and catching the sample about halfway through the drain. Also, they email your analysis in a .pdf and make it available online for you to log in and look at.

I went with Blackstone because they were recommended by bobistheoilguy.com

_________________
In this war of lines, so many have been crossed. Where will it all stop?

2006 Deep Beryl Green CRD Sport *SOLD 1/22/12*
Provent, V6 Airbox, Fumoto, Samcos, GDE ECO & TCM Tune, Euro JK TC, Magnaflow Catback
245/70/16 Destination A/T's
Boiler's Radiator Skid Plate
Jeepin' By Al 2.5 inch Adjust-A-Strut Lift, JBA Gen 4.5 UCA's (6/5/10)

I know you don't have to use the vampire pump.... I was just relating prices......

Wagner equipment company, which is who I work for, also emails sample reports in pdf form and mails a hard copy...

If blackstone is working for you, then continue

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2008 KK Liberty Sport NIGHT OPS EDITION + GILLS
OEM & Custom Skids - Factory Tow Package - Rock Lizard Skink Super Sliders
Prototype JBA 4 Inch Lift - JBA UCA's - Flowmaster Super 44 OR - Whacked Resonator
Jet Stage 2 - RL Gecko Basket Rack - Custom Winch Bumper - Recon 10.5K Winch

Thanks, I will just keep doing my oil changes. Did any one ever get a bad result?

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2006 LTD Bright Silver loaded with all the needed mods, CCV intact.
Proudly supporting CRD vendors, and their development of quality parts and accessories.
Equipped with HDS thermostat, plenty of heat, faster warm-ups, increased fuel mileage.

No CI or CJ rating though. Only CF, which is ooooold.

_________________
05CRD: GDE Hot ECU & TCM tunes, Provent, Cat filter, Facet lift pump, TransGo kit, Florida TC, Samcos, stainless brake lines, HDS thermostat, Renegade light bar,
RL super sliders, Bilstein adjustables, Al's Gen 4.5 Arms, 235/85-16 Duratracs, DTT rear, Elocker front, EVIC+TPMS, Turbo timer, McNally pillar gauges, Weeks Stage II kit.

te]

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2005 sport crd-SOLD No regrets

There are def a few nasty looking slips on here, and here's another.
While not horrible, it's not good. I would like to note, however that my ODO is about 7% low, with that in mind i am not particularly worried, however i will not be doing this again. Then again the liners are not exactly hard to replace.

I was going to go to 10k BUT i experienced excessive consumption near the end of this oci and I though perhaps that it was caused by high soot levels.
I am still not clear as to what changed to make the lubricant unable to protect the cyl effectively, nor am i sure what happened to cause the film to be burnt off.

So, consumption elevated = oil being burnt = oil not protecting on a the power stroak = scuffing, also scuffing is caused by excessive cyl pressures at lower speeds. For instance if you started off in fourth gear and floored it, pistons want to go sideways on the wrist pins, causing scuffing on walls (if they defeat the lubricant) Also i would like to mention that my filter was damaged by an impact with a rock.

So again, this is m1 TDT 5-40 this was a CI-4PLUS not cj-4 and a M1-301 Filter, air was k&n (swapped from a wix/napa gold at 2k because it was covered in mud and the k and n was handy, put in a amsoil at 8k) I expected more si due to the k&n but it simply is not there.

I am going to go 7k on my next oci/uoa and after than i will run 7k on RTS and uoa/tbn/tan. In the past i had experienced higher levels of consumption with RTS at 6k OCI's than I had with tdt 5-40.

It has been proven in other places that our crd's can do 7k no problem on RTS so at this point I am not seeing any reason to use TDT

This could have just been a bad/contaminated sample.

.

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2005 sport crd-SOLD No regrets

Oil: Shell Rotella 5W-40 CI-4+
Miles on oil: 9500
Miles on engine: 45000
Oil Filter: Mobil 1 M1-301
Air Filter: Mopar
Oil added: none



SUS Visc @ 210: 73.5
Flashpoint: 405
Fuel %: 0.5
Insolubles %: 0.3
TBN: 9.3

Here's my latest analysis from my second interval at around 9500 mi. Wear rates per mile are still at half of what they were before I disabled the EGR. I will probably keep extending it to 12000. I'm still using up my stock of old style Rotella. I'm glad I bought a bunch. I think I still have 3 gallons left. TBN is still amazingly high. That's not a typo.

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05CRD: GDE Hot ECU & TCM tunes, Provent, Cat filter, Facet lift pump, TransGo kit, Florida TC, Samcos, stainless brake lines, HDS thermostat, Renegade light bar,
RL super sliders, Bilstein adjustables, Al's Gen 4.5 Arms, 235/85-16 Duratracs, DTT rear, Elocker front, EVIC+TPMS, Turbo timer, McNally pillar gauges, Weeks Stage II kit.

Just got back my oil analysis, spectro chem analysis shows all properties are within range, with the exception of lead 3070ppm. Other than bearing corrosion any ideas where this is coming from??

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06 LIMITED 100000miles, MAGNAFLOW, HOMEBUILT CCV FILTER, POLAR PAD, 02 AIRBOX, CUMMINS LIFT PUMP, SEGR, PILLAR GAUGE POD, CAT FILTER MONITOR, SPYDER TRAX, ALWAYS A LITTLE TWO STROKE OIL OR BIO, WATER/METH INJECTION

What type of 2-stroke oil do you use in your fuel?

_________________
In this war of lines, so many have been crossed. Where will it all stop?

2006 Deep Beryl Green CRD Sport *SOLD 1/22/12*
Provent, V6 Airbox, Fumoto, Samcos, GDE ECO & TCM Tune, Euro JK TC, Magnaflow Catback
245/70/16 Destination A/T's
Boiler's Radiator Skid Plate
Jeepin' By Al 2.5 inch Adjust-A-Strut Lift, JBA Gen 4.5 UCA's (6/5/10)

Have been using Pennzoil outboard full synth for about 12 months. Good catch, never thought of that! I will post the full report.

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06 LIMITED 100000miles, MAGNAFLOW, HOMEBUILT CCV FILTER, POLAR PAD, 02 AIRBOX, CUMMINS LIFT PUMP, SEGR, PILLAR GAUGE POD, CAT FILTER MONITOR, SPYDER TRAX, ALWAYS A LITTLE TWO STROKE OIL OR BIO, WATER/METH INJECTION