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The highest oil temp I have seen personally was in a new Mustang with the 4-cylinder turbo motor. I had it as a rental and it ran 245-250°F on the highway with 0w-20.

I will check the software version. The delays between ECT and EOT is fairly consistent but can swing wider than what it is showing above. I love the 5w-40 Delvac ESP. Wear metals are half of what 0w-20 dexosD typically shows. I can't tell a difference in fuel mileage but the engine runs...

Yes mine stays between 230°F - 240°F on the highway. A previous response was saying 250°F is normal for them. I have never seen that high.

No forced regen. It only reads data.

Veepeek OBD II Bluetooth adapter off of Amazon and OBD Fusion app for my iPhone. It is fantastic and the parameters that can be monitored are endless.

Current temps on highway with cruise set at 70mph. 96°F outside temp. 5w-40 Delvac ESP.

Combustion by products are different for gas vs diesel applications. Wouldn't fuel dilution react differently as well? I have regularly used HDEO in gas applications mainly because I grew up in farm/heavy equipment and it was common practice. I hate having 6 different engine oils for my...

This is really interesting. First time I have heard this information presented this way.

You mean 5w-40? 10w-30FA has seen some light as well as a "modern spec". 15w-40 is still relevant or maybe I missed something and all of the 55gal drums are being sold for use in outdoor power equipment.🤷🏻‍♂️ Unless you are speaking from a perspective outside the US the information you have...

This is great info. Wouldn't the baseline be established in this case by the 450+ UOA's SpeeDiagnostix has performed on the 3.0 Duramax? The particle count scenario is understood and appears to translate consistently as well so not sure where unknown particles would come from in this case.

Well, that may be true but this site has been referencing these same UOA's for decades and this is the first I have seen their valdity challenged with this level of disdain. Also, I am unclear on what would satisfy conclusive DATA in your scenario. I personally think it would be highly...

Nailed it. Ever heard the phrase "paralysis by analysis"?? Is it it possible that the conclusion Lake is presenting is not "scientifically" correct? That is likely based on what several are mentioning here but it is also extremely likely that these engines will 100% of the time show decreased...

I am really curious now. I have been reading this forum off and on for close to 20 years and have great respect for the contributors including yourself. What would really be exciting is if experts on this forum collaborated with Lake in the sharing of ideas. I get (or assume) that several...

That is odd, Lake uses his real professional identity and provides reasoned data to the universe. Even the most respected contributors on this forum are hidden behind their user names.🤔🤷🏻‍♂️

These 3.0 Duramax engines run ~230-240°F at operating temps.

I bought a case of gallons on Amazon when it first released. Should be good for a couple years a t the rate I am using it.😉😁

I agree. Also, it occurs to me that this community could be an incredible contribution to the work that Lake is doing. He repeatedly mentions in his videos that his purpose is to share knowledge (not just his) and use science not speculation to inform decisions. There is a scientific brain...

BA in advertising and a lifetime in racing with a family pedigree? Tough crowd here...

I love CAT equipment but it seems corporately they are bent on watering down their brand until there is nothing left.