I do think 0w30 would be a good starting point, although I would personally feel even better working this little engine hard with a 0w40 or possibly even 5w40. I’m interested to see if the too thick argument Holds any water, I agree that it must be hypothetically possible though I also haven’t heard of a 5-40 grenading any engine. Another side to that would be that like others have pointed out there have been many other engines that spec a 0wXX but also allow for thicker oils with severe use. I personally doubt using thicker oil will cause any harm and will likely help but what I’d really like to know is if it stopped oil consumption for anyone who was experiencing it with the 0w20. A quart every 1-2k miles is pretty sad for a new engine in an expensive truck.
Hey so I’m about to my 5500 miles on esp x2 and I’ll be sending in another analysis. My truck has been worked about 50% of that.
Hell the last trip to the in-laws we battled 20-30mph head winds and at 75 that’s basically like towing a trailer.
It’s like clockwork. I use about .3-.5 in 5k.
I’m not sure what it would do towing max for real long periods but .3-.5 in 5k doesn’t bother me non at all.
I’ve been very curious if these trucks could run 0/5w-30 or 40 with no adverse effects. Obviously I would take protection over mileage any day.
My thoughts where GM clearly focused on efficiency first. And then what. Strain on the oil pump belt? Or would the raised viscosity result in less flow to certain areas? There’s some people on this page way smarter than me when it comes to how viscosity/flow/pressure and how they all effect each other.
For example esp 5w30 with a cst 100c of 11.8 vs the 0w20 at 7.9
That’s a increase of what. 35%? But if the truck can lubricate itself with cold 0w20 then obviously that increase really shouldn't matter.
But on the other side of things many vehicles have had better results with 0w20 than other heavier oils and there’s UOAs that back that up on this forum.
It’s the thick vs thin just with a new platform.
I really wish we knew what was best. And what exactly GM went through when they decided on their dexos D spec.
It is weird amsoil now says their 5w30 DP530 meets and exceeds the decos D spec but I can’t find any specifics for dexos D yet. One can assume it’s an hths 2.6-2.8 and
At the end of the day we know esp x2 holds a top spot among modern oils so I’m not terribly worried but I can’t wait to see what the next UOA looks like. Frankly
I haven't seen many for this engine yet either and most seem to spit out quite a bit of metal. But no samples have been taken on trucks with more than 15k miles.
Long story short. I love this power train and this is far from a closed discussion frankly.
The one thing I notice with the ac delco and esp x2 is they have a huge load of boron. And if I was to run another HDEO I would find one with .8% or less ash forsure. These trucks have what they call a SCRF so dpf and scr combined into one and it’s pretty small so even that 20% more ash I think long term could cause issues.