Valvoline Synthetic 15w-40

[MattW2388]

I just got this today to use in equipment. A little more expensive than the delvac extreme, hopefully it’s good oil.

 

[fantastic]

@JavierH19 recently posted this. Nice to see Valvoline get back into offering an HDEO.

Thread 'WM now shipping the new Valv HD FS & HD SB 15w-40'

Mar 4, 2025

Not a sale but Walmart began selling the heavy duty full syn 15w-40 at a reasonable $21.97 and the new heavy duty syn blend also a reasonable $14.97. Online only though but hopefully these hit shelves. The 10w-30 diesel crowd gets no love yet again unfortunately.

This is the pds for the FS and 4.3 hths and 8.4% noack are pretty good for a cheap full syn diesel oil. If xsp, t6, and extreme 15w-40 aren't on any sale I'd be choosing this...

• JavierH19

• 

 

[johnmyster]

Nobody can resist the giant V. Interested to see a VOA. Might give it a try if a rebate comes along.

Oh my, where’s the Cummins sponsorship stamp?

 

[Oilgeek24]

Wonder what the base oil is

 

[Foxtrot08]

Wonder what the base oil is

Adnoc more than likely.


I still just don’t get the point of a full synthetic 15w40. Soot is gonna kill it before viscosity break down. Unless you’re running a super tuned engine.

 

[53' Stude]

Adnoc more than likely.


I still just don’t get the point of a full synthetic 15w40. Soot is gonna kill it before viscosity break down. Unless you’re running a super tuned engine.

Think Mobil Delvac disagrees with you

 

[Hohn]

Adnoc more than likely.


I still just don’t get the point of a full synthetic 15w40. Soot is gonna kill it before viscosity break down. Unless you’re running a super tuned engine.

It depends on the engine. Modern soot dispersants developed for CJ-4 and later are quite effective. And if you're talking HEUI engines, viscosity breakdown is a given even in a bone stock engine.

 

[Hohn]

Nobody can resist the giant V. Interested to see a VOA. Might give it a try if a rebate comes along.

Oh my, where’s the Cummins sponsorship stamp?

CES 20086 is practically the same thing.

 

[Hohn]

4.3 HTHS, SN rated.

Interesting.

 

[Foxtrot08]

It depends on the engine. Modern soot dispersants developed for CJ-4 and later are quite effective. And if you're talking HEUI engines, viscosity breakdown is a given even in a bone stock engine.

Yeah you don’t really need to explain either to me. But, my point still stands. Soot will generally kill it.

You have synthetic blends going 900+ hours in heavy duty applications currently. You have some fleets pushing OCI’s out over 100,000 miles on synthetic blends. Thus, my point still stands… why?

But that’s why this is a “Walmart” product.