New truck advice

You think 20k intervals would be good?

 

Are you going with the Paccar or Cummins in the new ride?

 

18,000 on a newer motor like that, stretch to 20,000 at your own risk, just my opinion. And I would install a bypass oil filter, to help collect the soot. Here is one quite a few folks use with good results. Heavy-Duty Bypass System

Use your normal motor oil, I use regular old Rotella, synthetic is a waste of money.

These EPA motors, between oil changes, produce 6 lbs of soot. That soot stays in your motor oil and acts as an abrasive on the internal metal parts, rollers and cam(s).

Quite a few of us run a quality gear lube, 80-90 in the oil. These newer motor oils, to meet EPA regulations have stripped out, or should I say lessened the additive package. The gear lube contains those, like moly, among other things, that help with the longevity of the motor.

The gear oil also leaves a nice coating of oil on the surfaces it comes in contact with. I noticed this when I in framed my motor. Everything looked very good.

 

I went with the X15 performance 1850/525 with an 18 speed manual.

 

Exactly.

And why would you use a larger micron filter after your 10um davco? That makes no sense.

HPCR fuel systems are damaged by 5um and larger. You should be using a 7um in the davco and 5um on the engine.(or smaller)

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*****WARNING*****

Horrible horrible advice !!

DO NOT EVER ... EVER PUT GEAR OIL IN YOUR ENGINE !!

.....ESPECIALLY AN EMISSIONS ENGINE !!!

NEVER ... NEVER... NEVER !!

Holy-S where to even begin... How about the emissions system TOXIC, Killing anti wear additives in gear oil.... Not to mention it attacks the metals in your bottom end bearings. Gear oil IS NOT white metal friendly. Period.


You wanna pump THOUSANDS and THOUSANDS of $$$$ into your emissions system repairs.. Be my guest!! SMH !!


Cam lobe failure in most modem diesels is from old mentality running 15w-40 oils..... BAD BAD BAD !!

30WT oils have been the OEM fill spec for many years because they FLOW , even when loaded with soot !!

15-40 gets loaded with soot and creates PRESSURE .... NOT FLOW.
Oil starvation = Cam lobe failure... Etc.
This is not protection through oil pressure!

It gives engine death in a modern diesel!





And NO ! New CK-4 hasn't stripped out any anti wear! This is pure ignorance.

CK-4 anti wear packages are far better by using Boron and Moly , etc as much more thermally stable anti wear packages.

ZDDP has been getting phased out, it's EMISSIONS toxic and has terrible thermal stability in higher heat motors. It also produces metallic oxide ask... The #1 reason DPFs get clogged is the ZDDP ash , NOT anything to do with diesel soot!

ZDDP lives a very short lifespan in a modern motor. Then wear begins once it's gone if you are using older oil specs. Do not use it!


15-40wt oils have an exemption to use higher levels of ZDDP.... This is actually very bad for your engine, not good!...

This is also the reason there was such bad cam erosion problems in the ISX and Volvo motors years ago.

0-30, 5-30 or 10-30 should be used in 08+ engines, especially if you're running more than 20k intervals. The soot won't thicken the oil as badly to cause FLOW loss like a 15-40 Molasses.


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With a 30wt, YES ..... With 40wt be careful

 

Gear oil is fine in these new emission motors, just use the proper GL rating, SCR system is the issue. Tell that to someone running Lucas.

 

I have to get one in the next 2 weeks .I'm looking at 389s and 579s with X15 565 .
Cummins has experimented for 10 years with this junk science of hanging a crematorium under trucks.
So after 3 models of ISX failures , I'm thinking maybe this X15 will make it past that 400k self destruction pattern.
I just need the real scoop on 389 mpg vs 579 pulling reefers . No Paccar engines . X15 . If it's a mile a gallon? That's worth the ride and trade in returns.

 

Dont know the difference in mpg between models..but now know 2 people who have a x15 an neither get over 5.5mpg very often. The one driver pulled tank before with a paccar engine and got 7mpg and higher at times.