and just so you can refresh your memory, I took the liberty of pulling the schedule B for you, which I have read, many times..

What percentage of Diesel truck owners to you suppose fall under these conditions? (hint: some)

Schedule “B”
Follow schedule “B” if you usually operate your vehicle
under one or more of the following conditions.
• Frequent short trips where the engine does not achieve
full operating temperature (operating temperature defined
as 190° F (66° C) coolant temperature).
• Extensive engine idling (over 10 minutes per hour of
operation) at ambient temperatures less than 32° F (0°C).
• Driving in dusty conditions.
• Frequent trailer towing.
• Taxi, police, or delivery service (commercial service).
• Off-road or desert operation.
• Extensive operation at high engine speeds (greater
than 2900 rpm) and loads (greater than 70% throttle).

 

This pretty much sums it up don't you think? Your the one doggin' on me.

Take your crazy person meter and break it before it gets you in any more trouble. Do a little cognitive research before throwing around the concepts that others are ill-informed and your right. You MAY start to get an inkling how much you really do NOT understand.

 

thanks no_6_oh_no.

wasnt trying to start a war more just questioning the reasoning behind pushing the limits on oil changes. im around alot of diesel powered equipment on a daily basis from pickups to tractors to semi trucks and it is easy to see which ones have been religiously maintained and which ones have been pushed to the limits on service intervals.

from the sounds of it you guys really love your trucks and would like to join the exclusive no repairs million mile club but in my opinion and from what ive seen running high mile oil change intervals with expensive synthetics end up costing you more in the long run than running a shorter oil change interval with a non synthetic oil like mobile 1, valvoline or those looking for more valve train protection the john deere oils are also a good choise for our pickup engines. just my 2 cents worth.....

 

Well, you got the reading part down so work on the understanding part for a while. Hint: the obvious is staring you in the face in your post.

How about way more than 50% fit the schedule B recs, probably 80% of these trucks easily fall into that category and a bunch of those will fall into schedule C.

Now go check your your average speed. If its under 35 mph you are in schedule C extreme duty, oil change at 3500 miles. Gets your warranty denied also if the dealer or Dodge want to push the issue because a) you did not buy the truck for severe duty use and b) you did not follow the recommended maintenance schedule for severe duty use because you did not know it exists.

Just keep telling everybody that 15k is fine and how much you know about it, it gives us a little entertainment.

You didn't and hit the nail on the head with the observations. Some people just don't get how important oil and change intervals are in a diesel and will buy into any hype that fits their limited knowledge. Most of them with ALL the knowledge don't have enough experience and miles with a diesel to understand the differences.

The 5.9 has been in these truck for the better part of 20 years with a lot better oil than we have today, the 7500 mile chnage interval is solid and backed with millions of miles. It boggles the imagination to think we can take out the anit-wear additives, add grit and still go longer on oil changes.

A little reality check please: Nullum gratuitum prandium!

 

You guys are sure smart... I guess I should tell you I use CJ-4 oil religiously too..

c'mon let me have it..

idiots..

I'm not going to bother arguing any of your petty accusations about me saying anything specific, because I didn't.. You're probably one of those reaaaaly smart guys who can grade a motor oil by looking at it's "numbers".. like TBN and ZDDP content aren't you? so arguing with you is pointless..

go back and read anywhere I said EVERYONE can do 15k mile oil changes....

I'll wait..

 

I'm not telling anyone how long they should run between changes - go with what you're confortable with based on your driving habits.

That said, for me the oil consumption between oil changes is negligible at 95K, but I change oil every 7500 miles or less depending on what oil I’m running. Mobil One 5w40 mostly, but occasionally Mobil Devlac and that gets changed around 3500.

Tried Rotella T synthetic once and had noticeably more consumption – guess my truck didn’t like that stuff.

I could probably go longer based on my driving habits, but I’m just not comfortable with that.

One more thing – I also think luck has a lot to do with it as well. For example I have a buddy who had a Maxima for nearly 10 years. He changed oil “once a year” – it was his daily driver and had nearly 275K miles on it when he sold it. I checked his oil once and it was blacker than my diesel. He never had a problem with it. Some guys have all the luck - I'm not that guy.

 

I do not see a measurable amount of drop on the dipstickbetween changes. Use Rotella 15W40 and change every 4-5000 miles. Usually around the 4k mark

07 5.9

 

That is pretty funny right along with the name calling and derogatory attitude becuase someone disagrees with you. Yeah, you really do a good job with your credibility there. Yes, you DID indicate that EVERYBODY should do 15k intervals because you accused me of providing bad info. Just how do you think that gets interpreted.

Why don't take a look at what the OP posted and see if you can see where the potential problems are. Let me highlight them so you know what I mean.

Just me, but, if I'm dropping 2 quarts I would think that its past time to change. Sans any leaks, the oil is breaking down since I don't loose a quart at 7500 miles on good old 15-40 dino.

The second highlight is HARD on the oil and the engine. Period. Go ahead and argue the point but its not gonna change any minds.

So when we add anti-wear addtives back and we see less wear that means nothing? Sorry, gotta disagree there. Been around 2 long to swallow that story. Too many instances of accelerated wear and failures that should not be. We didn't have these problems with the 12V's 15 years ago, guess what the common factor is?

You sir are guilty of propogating and perpetuating false information based on nothing but opinion. In addition, you turn into an asshat when you get called on it. Suck it up and quit whining.

 

To the OP... I run a non-synthetic oil (Cat 15W-40 DEO) which is basically Mobil oil in a Caterpillar bottle. I run mine 5K without looking at the dipstick until change time, its always still on the full mark. 5K for me is around 8 months, its a mix of full/overloaded pulling in 100 degree heat down to idling at the drive thru at the bank. My main concern for extended oil change intervals is due to moisture content and TBN degredation. It is NOT CJ-4, it is CI-4 oil. I will continue to run CI rated oil as long as I can get it. The CI-CJ oil war on here and other forums are NOT where I base my decision for this. I have read the online testing, but I am relying on what I have heard form Cat engineers about CI-4 vs. CJ-4 rated oils... I will run CI-4.
As for synthetics, I have looked several times at the price point differences and cannot get the cost/benefit of synthetics to sway in my favor.
I can run dino oil for 5k and throw it away, or I can run synthetics for 5k, then sample, then sample again at 7500 to ease my mind, then again at 10K, and again, and again, and again...
Then theres the cost of filters that cannot run the distance that the synthetics supposedly can... or you have to run their filter and/or bypass system...etc..etc..etc...
I have personally witnessed what Royal Purple has done to several Cat engines and can attest to is destructive capabilities..

 

no_6_oh_no,

see, there goes my "crazy person" alarm again...

go take your meds, you're scaring the kids again...

I said absolutely nothing specifically telling people to run 15k intervals, and you can't call me on it. I said most people will follow what's in the manual for schedule A or B...

YOU sir are the one being derogatory and smug ... when people come on here and state an opinion (as you are also), you have to be accurate... I was accurate... you and your fear driven friend telling someone he's gonna have excessive cam wear going 15k miles between oil changes is fear mongering.

what else do I need to say? I'm done here... but I am getting a good laugh out of your rants... so go ahead... let me have it again..

 

hey to each his own. i really dont care what you do with your truck. going a bit far to call me out as a fear monger as i was just stating what ive seen.

Dodge also states that the oil in a nv5600 tranny never needs changed so apparently im wrong for changing it too?

 

I run the Valvoline Premium Blue 10w40. I change my oil at 7000-7500 intervals as mfr recommended, I have no oil loss with that use duration. I oil sample every oil change, all my samples have come back with excellent numbers. My silicone numbers vary between 1-2. I have the Amsoil BMK-25 dual remote filter system, use Amsoil filters for both the full-flow and bypass. I installed their single bypass filter when my truck was new, and installed the dual remote when I installed the twin turbos.

Yes, I could go to extended use, but oil and filters are cheap as compared to repair costs due to failures. I considered using synthetics, but I am not convinced about longer range oil changes being beneficial in the overall. The costs even out, so going to synthetics and longer use vrs staying with a regular oil and shorter use wash out money wise. I run Amsoil synthetics in everything BUT the engine. The track record for the Valvoline Premium Blue in our engines is excellent. There are may trucks with tons of miles running down the road without any problems.

I tow heavy on a regular basis, operate my truck in hot climate temps, travel on severly dusty roads half the time, and blowing dust is more often than not the rest of the time.

CD

 

Go here:
www.bobistheoilguy.com the forums are LOADED with intel.
There is a UOA (used oil analysis) section for guys to post there results. Go read, it will really inform you of whats going on. Read, get a feel for whats up, then make up your mind.

6 speed cowboys posted about synthetics, cam and lifter wear etc. This is perfect example of what to find on Bobistheoilguy.com.

On another popular board, There was heaps of misinformation about CJ-4 oil compared to CI-4.
Lots of people making blanket statements without any "FACTS" to support there claims.

Back to the top,, Polarlys and running amsoil 5-40 for 15,000 miles. This is the perfect candidate to run an oil analysis at 15,000 miles and post. He said he put the drain valve on,, grab a sample and send to blackstone

 

great post... couldn't have said it better..

 

Thanks all for the valued input. To Robert, Sorry I didn't think to remove the valve and see if a significant amount of oil was left in the pan. It would have been a smart thing to do. Maybe I'll remember next time. Thanks for the suggestion. We had been having a lot of rain lately. I had all the stuff sitting around just waiting for a nice day so when it came I rushed to get the job done. I did take into consideration the oil in the filter. When I pre-fill on installation it holds about 1qt. I did not do a careful measurement either, probably between 10 and 11 qts.

I also agree that it would have been a prime time for oil analysis. Didn't think of that one either. I don't have enough miles on my truck to have a lot of background to draw from. My around town miles was simply meant to imply non-highway miles. Moderate speeds, 35 -50. It usually does get fully up to operating temps. On the highway towing I usually hold around 60 -65 or so. My trailer is not a heavy load, perhaps 7k tops.

Someone asked about average speeds. Is that something that our trucks can monitor. That would be new to me and I'd be interested in how to check it if it is available.

Based on the comments I've seen I may re-think my change interval and reduce it. Have to think on that one. I may be pushing it a bit based on my driving habits. But to all, thanks for sharing your experience. This forum has been a valued resource and I hope it will continue to remain so. Next change will only be pushing 70k or so miles so oil analysis would be a valuable investment also.

Thank you all.