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Caterpillar C15 #4596280
12/06/17 05:15 PM
12/06/17 05:15 PM
Joined: Sep 2015
Posts: 34
San Antonio Texas
Redland1 Offline OP
Redland1  Offline OP
Joined: Sep 2015
Posts: 34
San Antonio Texas
Does anyone know the oil change interval for a 2006 caterpillar c15 engine? The truck probably falls under severe duty.High temperatures in the summer and -20 in the winter,lots of idling,hauls 110,000lbs full time,dusty roads.thanks.

Re: Caterpillar C15 [Re: Redland1] #4596284
12/06/17 05:20 PM
12/06/17 05:20 PM
Joined: Mar 2013
Posts: 4,758
The Midwest
skyactiv Offline
skyactiv  Offline
Joined: Mar 2013
Posts: 4,758
The Midwest
Go by hours, 500 to be safe.


Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual
Re: Caterpillar C15 [Re: skyactiv] #4596301
12/06/17 05:42 PM
12/06/17 05:42 PM
Joined: Dec 2016
Posts: 6,226
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,226
Waco, TX
Originally Posted By: skyactiv
Go by hours, 500 to be safe.


That probably a little conservative.

NO WAY TO REALLY know without an oil analysis sent in after 300-400 hours and every 100-200 hours after.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Caterpillar C15 [Re: Redland1] #4596311
12/06/17 06:04 PM
12/06/17 06:04 PM
Joined: Oct 2017
Posts: 201
A Highway Near You
PiperOne Offline
PiperOne  Offline
Joined: Oct 2017
Posts: 201
A Highway Near You
Is it an ACERT engine? And if so what version? (does it have the "spark plug" after the 2nd turbo?) If it is...500 hours is about as far as I would want to go...those things with the fancy valvetrain and 2 turbo's can be nightmares. If it's a good old style 6NZ then 500 in those conditions is likely OK. I'd do some sampling tho.


HDEO in Diesel Engines. No spark plugs here.
Re: Caterpillar C15 [Re: Redland1] #4596452
12/06/17 08:44 PM
12/06/17 08:44 PM
Joined: Dec 2006
Posts: 4,219
Port Orange, Florida
Panzerman Offline
Panzerman  Offline
Joined: Dec 2006
Posts: 4,219
Port Orange, Florida
Back when I was in trucking we never had C15s but had Cummins N14 which was the equivalent.
We would change the oil every 250 hours but that was in severe conditions such as strip cuts and ash. My cousin has C15 Cats in trucks and he said they don't have hour meters and change every 10,000 miles.
My dad used to get oil samples done on the oil and I asked him are you really going to tear the motor down if you get a bad sample back, he said no.
I said then quit sampling the oil because they aren't either under warranty. So he did. Total waste in my opinion.



2006 Dodge Ram 2500 Hemi 4x4
2016 Dodge Challenger Scat Pack
Re: Caterpillar C15 [Re: Redland1] #4596533
12/06/17 09:33 PM
12/06/17 09:33 PM
Joined: Mar 2015
Posts: 207
Oklahoma
tomcruise Offline
tomcruise  Offline
Joined: Mar 2015
Posts: 207
Oklahoma
We put 10k on the next service stickers on c15s at work. Rule of thumb has always been 1k miles per gallon in my world.


2016 Ford F150 Xlt 2.7L
Pennzoil Platinum Euro L 0w40
Motorcraft FL2062
Re: Caterpillar C15 [Re: Redland1] #4596582
12/06/17 10:09 PM
12/06/17 10:09 PM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline
motor_oil_madman  Offline
Joined: Nov 2009
Posts: 4,941
Houston, Texas
That would call for an oil change every 3000 miles on my cummins.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Caterpillar C15 [Re: Redland1] #4597367
12/07/17 06:57 PM
12/07/17 06:57 PM
Joined: Sep 2015
Posts: 5,849
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline
Joined: Sep 2015
Posts: 5,849
Kalifornia Kollective
See how easy it is to get back to 3K changes laugh


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
Re: Caterpillar C15 [Re: motor_oil_madman] #4597499
12/07/17 09:22 PM
12/07/17 09:22 PM
Joined: Jan 2008
Posts: 3,295
Central Iowa
TiredTrucker Offline
TiredTrucker  Offline
Joined: Jan 2008
Posts: 3,295
Central Iowa
Originally Posted By: motor_oil_madman
That would call for an oil change every 3000 miles on my cummins.


Quite a bit of difference between a baby diesel in a pickup compared to a 3000 lb 15L working engine in big truck. The Cat manual on the C15 calls for 25,000 miles / 500 hrs for normal service. For severe service, the manual suggests 250 hrs. It recommends oil sampling at these intervals also. For the OP's use, 250 hrs would be a good starting point and you could work your way up a little each time and do sampling to see when things start to show you have reached the maximum length you can go. Change and do a sample at 250 hrs, then next time do a change and sample at 300 hrs, etc until you reach the point where things look like it is deviating from the trend pattern. I have typically taken heavy diesel engines to 50% longer than the OEM recommended drain interval and still been well within any safety margins. And that is on regular CJ-4 conventional oils.

Far cry from the newer engines. Some of them at least 35,000 miles with a few in the 50,000 mile / 1250 hrs category for OEM recommended oil changes.


Freedom is not about having the choice to do what you want, but the choice to do what you ought.

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