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I looked back at my previous UOAs and they all indicated I was using Shell Rotella T6 15W40. I know I've been using it for a while. I used Mobil Delvac ESP 5W40 too but it's been a really long time, can't remember when. I've been thinking about switching back to Mobil ESP 5W40 to see if things...

Wondering what's going on here. Been trending a little high on iron recently. Just changed it a month or 2 ago and need to send in my sample. Truck is at 151k now. Thoughts?

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Thanks for the explanation, makes sense now.

Man I just read through this whole thread. Can't believe the amount of abuse these trucks will take. Good read. Toadu, looks like on some other threads you posted your new F450 with the power stroke. When you spoke about all gas fleet were you referring to the larger trucks like 650's? Not...

So is this stuff Mobil Delvac Super 1300 repackaged as Kirkland? It's CK4 & SN. I'm not too familiar with Warren Distribution.

I actually picked up this same oil in Walmart a couple days ago. I hope Walmart is going to start carrying this from now on.

Originally Posted by ToadU Hello, Much of the information given here is totally incorrect and based on opinions and "gut feelings". The facts are contained in your instruction manual. Ford has over 19 million miles experience on the PS6.7. Arguably, this engine is the most important core...

Originally Posted by High Performance Lubricants Originally Posted by oakaro68 HPL, Since all the modern trucks are calling for CK4 and your oil is CI4, I'm wondering what affects your oil will have on DPF/SCR/etc. Have you done much testing on this? Thank you for the question. The answer is...

HPL, Since all the modern trucks are calling for CK4 and your oil is CI4, I'm wondering what affects your oil will have on DPF/SCR/etc. Have you done much testing on this?

I know I love changing oil too. I try extending but also get antsy to tinker

Originally Posted by Too3zln My owner's manual for my lml, if I remember correctly, states to not plug it in until 0f or colder. I'm assuming yours is similar or even better. An anti-gel, on the other hand, is a must in cold temperatures. I will not be stuck with gelled fuel again. Yeah same...

Originally Posted by BrianF Don't think twice. Run the 15w40. Already said, many people I know run conventional 15w40 all year up here. When it gets too cold, they use a block heater. Only thing is my block heater has a recall on it that I still haven't fixed yet so I probably won't be using...

Originally Posted by Olas 15w is appropriate down to minus 20 celsius (otr minus 4 farenheit) will it get that cold at your location? Hard to say honestly. I'm headed to NM in the mountains for a ski trip. Statistical weather data shows the area gets to about the mid teens but it's possible it...

I'd like to see a uoa on this oil. I'm considering running an oci with this oil in my Duramax. This may be a dumb question but would this oil result in increased wear with such a high amount of detergents?

My Duramax had higher copper, I believe from the oil cooler. It came down after the next few uoas. I wouldn't be worried.

Originally Posted by A_Harman Originally Posted by bismic1 I must admit I really want to see the trends ...... lol. That said, it may just be that the engine is wearing in nicely over time (but I sure would have expected to see that MUCH earlier). Even so, SOMETHING CLEARLY HAPPENED when I...

Originally Posted by Rand if you are worried about it just change it out now for some 5w40. otherwise I wouldnt want it below 5f daytime temps... unless you can plug in for morning starts. I know in my tractor I used to plow with delvac 15w40 is honey at 10f-15f. edit t6 15w40 (if that is...

Originally Posted by Snagglefoot Are you going to reveal where you are headed? It's not Winnipeg is it? Headed to the mountains, around 11,000ft

Originally Posted by CT8 Originally Posted by dave123 Many many guys run year around up in north personaly I wouldn't worry unless teps were only going to be highs in single didgits you might see overnight lows dip down but not below 0F. Curious how far north you are going. A Texan going to a...