I know this topic can get a little heated so I'm really not trying to start that up, just want to gather some info.

 

It's time for another oil change and I'm doing it myself. My dealer raised their prices so it no longer makes sense to take it to them. Here's my questions

 

1. Currently have 15w-40 dino oil and looking to swap to synthetic. I've only seen Amsoil that has a synthetic 15w-40, does anyone else?

2. If I do put something like Rotella T6 5w-40, what's the chances of making leaks worse or appear?

3. Should I even worry about running a lighter weight oil when my current climate never see's 0* or below temps?

3 minutes ago, Mopar1973Man said:

At least my junk isn't blowing oil all over the place. Mine does leak a bit around the gear case and burn a bit through valve seals.

Billet tappet covers aren't friendly, but they do work well for getting the pressure out. I'm going to figure something out to keep the oil in the motor.

Either reduce the blown on the piston rings or reduce the boost and drive pressures.

1 hour ago, Mopar1973Man said:

Either reduce the blown on the piston rings or reduce the boost and drive pressures.

Under extreme cylinder pressures blow by is going to happen no matter what.

Not going to reduce anything, just need to figure out how to keep the oil in the crankcase with that style of breather.

Edited June 29, 20177 yr by TFaoro

2 hours ago, Mopar1973Man said:

Either reduce the blown on the piston rings or reduce the boost and drive pressures.

 

The tappet cover he has is completely open for the holes. Nothing to slow down or condense the oil before exiting. I had a similar issue when I tried to use it. I did warn him it was going to push oil out of them lol

2 hours ago, jlbayes said:

 

The tappet cover he has is completely open for the holes. Nothing to slow down or condense the oil before exiting. I had a similar issue when I tried to use it. I did warn him it was going to push oil out of them lol

I have the keating cover with "baffles"

Either way the engine needed something so......

I'll just leave this here.... I think UOA's like this speak volumes for synthetics. TBN is over 9 after 11.5 months. 

 

I'll add that my average fuel economy was around 13 for this timeframe. The truck gets good mileage when empty, but I'm not empty often. This 6400 miles has some descent towing/hauling and all of it is with a 400rwhp tune. I'm not overly easy on the motor, but I don't abuse it. 

Edited June 30, 20177 yr by AH64ID

I didn't know 15/40 was a synthetic from Amsoil. Hmm

Yes. They have a couple, but I like the AME Heavy Duty Diesel and Marine oil. It's a CI-4+ 15w-40 that does awesome even in cold soaked temps down to -20°, which is the coldest I've started it in. I've ran it down to -30° but it was "warm" when I got to those temps. 

14 hours ago, TFaoro said:

I have the keating cover with "baffles"

Either way the engine needed something so......

 

Why in the world did I think you had the open hole one like I did.....

7 hours ago, TFaoro said:

I didn't know 15/40 was a synthetic from Amsoil. Hmm

 

John just ordered me some! 

59 minutes ago, jlbayes said:

 

Why in the world did I think you had the open hole one like I did.....

 because you told me very specifically do NOT get the one you have.

Get @trreed to buy it from you and you can buy a Keating cover.

Yeah I'll stick with my 12v breather.  Thanks doe.

Edited June 30, 20177 yr by trreed

5w-40 and 0w-40 have the same high temperature (operating) viscosity as 15w-40, and running any of the aforementioned synthetics will, at the very least, be just as good as conventional oil. Where the synthetics excel is maintaining the proper cold viscosity at lower temperatures, eg. cold starts, as well as attaining a much higher oil degradation temperature, which you would find in your turbocharger after a hot shut down; the synthetic oil doesn't start to coke until almost 100 F higher than dino oil iirc.

 

Unless you've dealt with the PCV and care that much about a little weeping from a seal or two, the only thing synthetic is going to hurt is your wallet...

Edited June 30, 20177 yr by nukethenazis

Just got to say that @AH64ID is the man!! Ordered some oil from him yesterday and it was sitting on my door today! At a better price too boot!

On 6/25/2017 at 5:04 PM, dripley said:

I use the blue ones too. Thanks for turning me on to them. Pretty good price wise also if you buy several as I remember. 

hey drip what is the donaldson blue p/n for the oil filter? currently im using fleetguard and if donaldson is better ill switch. tnx mang

I believe it is DBL 7349

^^^ that's what I use too

Thats the one. DBL7349. You can get them faitly reasonable in quantity if you shop around. Bought mine at filterspro.com.

 

Edited October 4, 20204 yr by dripley

tnx guys, i have in my cart a set of 2 for $30 in amazon

2 hours ago, CUMMINSDIESELPWR said:

tnx guys, i have in my cart a set of 2 for $30 in amazon

Order 12 and get real deal,. Just kidding. I bought 10 the first time but used them up in just over 2 years. My truck travels a whole lot more than yours.