HPL now has Dexos D 5w-30

OP @wwillson has the same exact problem as I do - burn off in high EGR temps, if his testing proves that HPL 5w30 Dexos D is indeed helping with burn, then I am sure they will get a few more orders for 5w30 Dexos D. I have tried different 0w20 brands of Dexos D-approved. My observations are non-scientific but I do drive same routes again and again across the state weekly, AC Delco was burning off most, Mobil 1 was slightly less (folks on forums say that Mobil 1 makes AC Delco Dexos D oils but I do not know if true, bottles certainly look very similar). With AC Delco I am 1/2 full on probe shaded area in 4K miles, with Mobil 1 I am 2/3 full after 4K. Of course different weather, season, speed, so many factors that are different but same trips. I wonder if @wwillson will be able to notice the difference in burn off with HPL. Watching this thread.

Even if Mobil1 makes the oil for AC Delco that doesn't mean both sell the same oil. I'm sure they will blend your version of dexos D aswell, if you pay for it.
 
I have pinged @High Performance Lubricants 4 days back asking if Dexos D 5w30 is orderable but no response yet. Does anyone know if David is still communicating on BITOG, he used to be active and approachable from my reading.
I apologize. I am out of the office this week. As others have mentioned orders can be placed with Mary Jane and we honor the BITOG15 discount code regardless of how the order is received.

David
 
I'm going to try to grab a few gallons of this during the Black Friday sale.
Does HPL do BF sale? I am liking their 5w30 DexosD so far but there is not a thing different about it subjectively when compared to Mobil1 X2 or ACDelco DexosD 0w20 blends. I do not hear any difference in sound, same sounds on cold starts and during normal operations. Too early to tell on the burn off I only put 1,100 miles on the HPL fill.
 
Does HPL do BF sale?
There is a standard 15% off for all BITOG members and a 20% off with fixed shipping for the next three days.

 
29.5 is my average in the interstate. 24 is my average driving around town.
That is pretty nice. Really, that is where it should be, if not more. I have nothing that gets near that. What is your overall opinion of the truck?
 
That is pretty nice. Really, that is where it should be, if not more. I have nothing that gets near that. What is your overall opinion of the truck?
So far so good. It's a complex vehicle so I hope it holds up the way my much simpler Durango did.
 
My update on 5w-30 Dexos D blend from HPL. 5.1K miles. I decided not to do the oil analysis... reason is that I saw zero change in oil consumption vs. Mobil 1 ESP X2 0w-20. In fact slightly more burn with HPL but probably due to weather, temps, speed. I am sure it is great oil, just not solving my problem. My burn off is tolerable and I was hoping that HPL in 5w-30 Dexos D will stop it but will just proceed with ESP X2 in 0w-20.
 
The back story is the 3.0L LM2 Duramax in my Tahoe uses some oil predictably when operated continuously under load. I define that load as operation with EGTs above ~1050°F, which happens quite often when traveling on grades, headwinds, and when pulling a trailer. The manual calls for Dexos D 0w-20, which @High Performance Lubricants graciously made for me. Initially I was a bit concerned about the oil volatility because I have read many reports of the 3.0L using oil. HPL said the only way to meet the 0w-20 viscosity requirement is to use low viscosity PAO, which has a fairly high volatility, hence the oil consumption.

I asked David Ward if they would blend a Dexos D compliant 5w-30 for lower volatility and higher HTHS, of course he said yes. The 5w-30 should have about 1/2 the volatility of the 0w-20.

I'm going to exchange the 0w-20 for 5w-30 this weekend and the experiment will begin.

This showed up at my door today!

View attachment 244534
I think it's a good idea to switch to 5-30.
 
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