although my o5 srt4 got mobil 1 last weekend at 2,700 miles.

 

I'm a big fan of the synthetic. I personally run the Amsoil HDD 5W-30 heavy duty diesel oil - outstanding results for me. 7000 miles later and the oil is still cleaner, when combined with the EA080 Amsoil filter than any other oil/filter combination I've used.

2004 w/ 94k still running like a champ.

 

5w30? I have run Amsoil 15-40 and it seems good, you can feel how slipper it is if you dab some on your fingers and rub them together, more slippery then convntional. I've ran Synthetic for about 4 changes now.

 

My last truck 2006 5.9 had over 400k with Amsoil oil changed at 35k mile intervals. Waiting for new truck to breakin before switching to syn oil

 

I changed mine to synthetic today at 5,000 KMs. I'm using Mobil 1 5w40 Devlac CJ-4 approved.

 

5w30? I have run Amsoil 15-40 and it seems good, you can feel how slipper it is if you dab some on your fingers and rub them together, more slippery then convntional. I've ran Synthetic for about 4 changes now.

yes, their HDD 5W-30 heavy duty diesel oil, it's the highest TBN diesel oil they sell.

I wanted something to run for 20k miles. I'll swap the filter half way through but the oil will go for a year.

https://www.amsoil.com/storefront/hdd.aspx

More info on Ken's site
http://www.modernoils.com/Series_3000_HDD_5W30 .html

 

I switched over to synthetic on the first oil change.

Mobil 1 Turbo Diesel.

 

My last truck 2006 5.9 had over 400k with Amsoil oil changed at 35k mile intervals. Waiting for new truck to breakin before switching to syn oil

You put 400k on an 06 all ready? DAMN! I thought I drove alot.

I switched over to AMSOil at 20k miles and change my oil every 12k. I'm sure it could go longer, but with the beating my truck gets pulling heavy loads, I change it sooner.

 

I switched to the Amsoil 15w40 around 30k, about 33k or so..

Read up on the Cummins website, they advise not to run a synthetic until at least 20k miles...

 

I thought CUMMINS states not to run synthetic until atleast 60,000miles??

 

Cummin`s did say 20,000 thats when I did mine, its like an amsoil commercial on here, so yes I do use amsoil 15-40, have for the last 2 changes, I do mine every 10,000, oil, filter, fuel filter, and clean the air nano filter, works for me.

 

20,000?? wow, i guess the break-in period really has DECREASED!!

 

I've been running Amsoil since I bought my truck, only put 3k miles since first oil change. I like the look of my oil so far, but after 5k miles in my bros 03 CTD I am quite worried about Amsoil, after only 5k miles the oil looked totally broken down and nothing left. Going to have to get a oil analysis before I have any faith in Amsoil.

 

Mine at 10,000 was fine, from what they told me I could have gone another 5000 anyways, but Id rather not take any chances.

 

20,000?? wow, i guess the break-in period really has DECREASED!!

It is not that it has decreased, I think it is that most people are finally realizing that the no synthetic oil during break-in was just a big myth.

 

I changed mine to Amsoil HDD 5W-30 as soon as I got her home from the dealer. No issues and 18-19 mpg. :rck:

 

my sprinter van turbo diesel came with mobil 1 from the factory

 

I'm not sure why you guys run 5w-30 instead of the recomended 15w-40. what does your deal say to that?