I currently run this type of oil in combo with an Amsoil EA052 filter. I haven't done an oil analysis and probably won't BUT about @ 10k miles - my change engine oil light comes on and I just reset and drove on.

With just my current set-up, under normal operating conditions is my oil still have a decent amount of life left or should I listen to the truck and change it?

Your truck doesn't know Mobil Delvac 1 ESP is inside - it assumes the cheapest CJ-4 oil performance level. Even though Mobil Delvac 1 ESP is very robust, you may consider following your oil change light during the warranty period.

Won't affect warranty - they have no idea if you changed it or not - as long as you reset the DIC. However I think 10K is aplenty on any oil unless you do analysis...

:pimp:

I have run nothing but Delvac 1 in my truck. I have done a UOA at every oil change. Last change had 9909 miles on oil and TBN came back at 6.9 which means there was a LOT of life left in the oil. Blackstone recommended I go to 11K; I'm going to go to 12,500, send in a sample and see where I am. Point is, you can go more than 10K on this oil, but if you are going to run it longer, you should do a UOA at around 10K to see how you're doing

I agree with several on this one.

Blowing past the OLM isn't a bad thing at all, but it requires some due diligence on your part. At this point, UOA's are a must to track the useful life of the oil. There isn't any external thing you can smell, feel, taste, touch or hear that will tell you the oil is nearing the end of it's life cycle. You WILL smell, feel and hear the engine grind to a halt at some point if the oil is completely neglected. However, that's a very bad way to tell if the oil is past it's prime!

Overall, the Dmax's are showing good oil results at 10k miles easily. Going past that is certainly viable, but you MUST monitor the engine oil past that point with UOA's. The Mobil 5w-40 is an awesome product, but it's not a miracle fluid; it will not "automatically" tell you when it's over the edge. You must seek the evidence with UOA's.

You cannot judge an oil by how "dirty" it looks.
You cannot judge an oil by how "slippery" it feels.
You cannot judge an oil by how "sweet/sour/funky" it smells.
You cannot judge an oil by how "quiet" the engine seems to run.
You cannot judge an oil by how "tangy" it tastes (actually saw an idiot do this many years ago!).

The OLMs are fairly accurate. Those people that use both the OLM and UOA's seem to find that the OLM is a bit conservative, but overall that's OK if safety is paramount in your mind. What the OLM does is calculate oil life based upon temps, rpm, fuel load, etc and compares them to a "chart" in it's brain that is derived from a statisical analysis the engineers put together. What the OLM CANNOT tell you is what oil brand/grade/group you're running, nor what contaminants your engine might be experiencing. If you have a top end oil, there might be more TBN remaining, and you might be "wasting" oil by dumping it too soon. Or, OTOH, if you have a coolant, air or fuel leak, you could have oil that is degraded too soon, but your engine doesn't know it, and you might be in the danger zone before the OLM would otherwise tell you to change the oil. The OLM works well if all the other operating systems are functioning properly. The OLM doesn't sample the oil; it reviews operating patterns and compares them to a predetermined chart and makes a prediction accordingly.

Just in case you missed the point; UOA, UOA, UOA!

Thanks for the help guys. Guess I'll get an analysis done. Where does one go about getting one of those little kits?

Many different services available.

Blackstone is very popular. So is Oil Analyzers. Google and Yahoo are your friends ...

Thanks for the help guys. Guess I'll get an analysis done. Where does one go about getting one of those little kits?

Any Amsoil dealer can get you the Oil Analyzers kit or you can go onto Amsoils website and buy one which includes the lab fees, packaging materials, sample container and shipping fees all inclusive.

Blackstone you can get a free kit from them but it can take as much as two weeks to get the it. You will also (I beleive) have to pay your shipping costs as well as lab fees. If you want it immediately I would go with the Oil Analizers kit.

http://www.blackstone-labs.com/


http://www.oaitesting.com/