New Engine Oil and Oil Pressure

[swathdiver]

Howdy folks!

A few months ago I noticed that ACDelco's website https://parts-catalog.acdelco.com/catalog/catalog_search.php was showing a new oil for 4WD vehicles when I ran my VIN. The earlier 4WD long trucks came with aluminum engine blocks and thus see more expansion than cast iron blocks during operation. I'd been a little concerned that M1 was too thin, the motor noisy at start up which is "normal" and then quieted down. It also ran so much better with 4,000 OCIs compared to 5K-6K changes.

Anyhow, I researched the oil as best I could and found an SDS sheet with some specs and it showed higher viscosity numbers than the regular Mobil 1 I've been running. The oil is made by Phillips 66 Lubricants.

To make a long story short, getting hold of this stuff was not easy at first. First two companies had large minimums, one wanted me to buy 12 bottles, the other 195! Well, after more searching I found it down in Palm Beach county for $22 a bottle and it comes in case form, 3 bottles.

Since the change there is no more rattling cold motor starts and the oil pressure has actually increased all across the spectrum. I would say when hot, it is running about 3 psi more than before and a lot more when cold. I've NEVER seen the oil pressure gauge so high before. Idling at temperature is about 29 psi according to the Tech-2.

A while back we were all talking about pressures and I noticed that the Mobil 1 oil filter lowered my oil pressure, using the M1-212A and would alternate based on access and sales with the K&N HP2011. These are the long filters. Well, the K&N definitely allows for a higher oil pressure and that one inch nut makes removal a breeze (shhh, don't tell anyone that we use it to tighten the filter too!) I think the K&N gave about 2-3 more psi too.

5 Quart Bottles:
GM PN# 88865743
AC Delco PN# 10-9147

1 Quart Bottles
GM PN# 88865905
AC Delco PN# 10-9234

At the end of the second oil change with this stuff, we'll send off a sample to Blackstone Labs. I have another sample of M1 sitting on my desk here waiting to go out too.

If anyone tries it, please let us know your experience with it too.

 

[Mickey_7106]

more viscosity but still listed as 5w-30? i thought it was best to run oil with higher zinc

 

[swathdiver]

more viscosity but still listed as 5w-30? i thought it was best to run oil with higher zinc

I don't know about zinc but these are the numbers I was referring to Mickey:

 

[BG1988]

Howdy folks!

A few months ago I noticed that ACDelco's website https://parts-catalog.acdelco.com/catalog/catalog_search.php was showing a new oil for 4WD vehicles when I ran my VIN. The earlier 4WD long trucks came with aluminum engine blocks and thus see more expansion than cast iron blocks during operation. I'd been a little concerned that M1 was too thin, the motor noisy at start up which is "normal" and then quieted down. It also ran so much better with 4,000 OCIs compared to 5K-6K changes.

Anyhow, I researched the oil as best I could and found an SDS sheet with some specs and it showed higher viscosity numbers than the regular Mobil 1 I've been running. The oil is made by Phillips 66 Lubricants.

To make a long story short, getting hold of this stuff was not easy at first. First two companies had large minimums, one wanted me to buy 12 bottles, the other 195! Well, after more searching I found it down in Palm Beach county for $22 a bottle and it comes in case form, 3 bottles.

Since the change there is no more rattling cold motor starts and the oil pressure has actually increased all across the spectrum. I would say when hot, it is running about 3 psi more than before and a lot more when cold. I've NEVER seen the oil pressure gauge so high before. Idling at temperature is about 29 psi according to the Tech-2.
.

it's only $18 here
https://www.gmpartsgiant.com/parts/...-full-syn-5w30-acdelco-5qtx3-tl-88865743.html

29 is too low idle



50PSI here idle


60-65 1500rpm


70-75 PSI cold running Mobil1 with EP filter from mall mart SN plus version 5w30




but i did check and they lowered the price to $22.88 last time it was a few $$$ more for the 0w30 (claims to meet 5w30 and 10w30 requirements)


I'll be adding some Motorkote
that stuff seems to do what they claim. they claim it leaves a film that can't be washed off "but only sanded off".. but I think the hybrid will benefit because of the frequent HIGH SPEED starts.... starting the engine puts a lot of wear and tear on them

 

[swathdiver]

it's only $18 here
https://www.gmpartsgiant.com/parts/...-full-syn-5w30-acdelco-5qtx3-tl-88865743.html

29 is too low idle



50PSI here idle


60-65 1500rpm


70-75 PSI cold

GMParts Giant was my first stop, they have a 12 bottle (5qt) minimum and shipping is very reasonable if one is inclined to buy 12 oil changes in advance!

Your oil pressure numbers allude to you having an iron block motor? I've never seen the needle past 50 psi that I recall, cold, hot or otherwise. The bypass spring in the M365 pump is 33 psi.

 

[BG1988]

it's an Aluminum block she Powers on at 70PSI
it has a lot on common with the LS2 then it does with the reg 6.0

Cylinder Head Casting Number is the same (799 or 243)



seems like there is a lot of untapped potential with the engine the compression ratio is slightly lower at 10.7:1 but i'm sure VVT makes up for it.
the LS2 is 10.9:1

 

[thompsoj22]

Just wondering are you noticing an increase in piston slap at idle with the higher viscosity? I am loyal to mobil1 but got caught up in the marketing for valvoline full syn and gave it a shot. same 5/30 but absolutely had higher gauge readings and to my surprise more noticeable piston slap at idle. I changed back to mobil 1 within 100 miles and the slap went away. i like oem products, wait now i get it! i thought your op was $22 a qt but now i see the "bottle" must mean 5 qt. thats not so bad.

 

[gooffeyguy]

it's only $18 here
https://www.gmpartsgiant.com/parts/...-full-syn-5w30-acdelco-5qtx3-tl-88865743.html

Is that link for a single 5qt jug or three 5qt jugs?

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

 

[swathdiver]

it's an Aluminum block

Hybrid? I forget what you're driving.

Just wondering are you noticing an increase in piston slap at idle with the higher viscosity? I am loyal to mobil1

I was loyal too. Only switched off when I ran a Jiffy Lube back in the 1990s for a spell. No more noises from the engine due to "thin" Mobil 1. That's why I switched.

Is that link for a single 5qt jug or three 5qt jugs?

Per 5 quart jug, they have a 12 bottle minimum Tom. It's a great price, even better than M1 from Walmart.

 

[PG01]

You’re a good man James

 

[gooffeyguy]

Per 5 quart jug, they have a 12 bottle minimum Tom. It's a great price, even better than M1 from Walmart.

So you have to buy at least $216 worth of oil?



2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

 

[97audia4]

I may be switching over to ls30. I too was using valvoline but switched back to Mobile one and pressures cold and hot are much better but after reading the ls30 specs I am going to be giving it a try before my first tow next weekend.

 

[swathdiver]

So you have to buy at least $216 worth of oil?

Yes! Look around your town for an ACDelco dealer. The company I found is Florida based and had all kinds of ACDelco and other brands but racks and racks of AC Delco batteries too. They are not listed on ACs website as they are a wholesaler. See if you can find such up there.

Thanks Pete, now tell my kids when I make them do their chores!

 

[norcalboon]

About due for my first oil change since I purchased our 2012 Denali XL, think I might give it a try. Got 7 qts on RockAuto for $41 shipped. This will be at about 3,500 mile interval but last was done by a oil change place & not sure what was used, planning to go 5K changes for future.

Do you not like the AC Delco Professional (long) filter?

 

[BG1988]

About due for my first oil change since I purchased our 2012 Denali XL, think I might give it a try. Got 7 qts on RockAuto for $41 shipped. This will be at about 3,500 mile interval but last was done by a oil change place & not sure what was used, planning to go 5K changes for future.

Do you not like the AC Delco Professional (long) filter?

They use cardboard end caps

sounds great tell you have a blowout
it will be a cardboard sludge disaster in your engine (meaning your enigne will become seized if it blows out)

the cheap comes out expensive.

 

[swathdiver]

About due for my first oil change since I purchased our 2012 Denali XL, think I might give it a try. Got 7 qts on RockAuto for $41 shipped. This will be at about 3,500 mile interval but last was done by a oil change place & not sure what was used, planning to go 5K changes for future.

Do you not like the AC Delco Professional (long) filter?

As Brent mentioned those "E" filters are of lessor quality. Now if we had a non-AFM engine, I wouldn't bother. But since we do, and have that fine pickup screen under the oil pressure sensor that feeds oil to the VLOM, clogging that up with pieces of cardboard is a recipe for disaster. We've seen lots of guys wonder what this stuff is when their oil pressure sensors act up and they find the screen all plugged up.

Champion Labs makes both the Mobil 1 filters and the K&N Gold filters. I've been buying the K&Ns for $9 each delivered from Amazon; now they are on a 2 order minimum which is fine by me.

The M1 filter delivered noticeably lower oil pressure, about 2-3 psi on average compared with K&N.

 

[swathdiver]

I may be switching over to ls30.

Jeff, do you have specs for this oil so it can be compared with the others?

 

[swathdiver]

About due for my first oil change since I purchased our 2012 Denali XL, think I might give it a try. Got 7 qts on RockAuto for $41 shipped. This will be at about 3,500 mile interval but last was done by a oil change place & not sure what was used, planning to go 5K changes for future.

Do you not like the AC Delco Professional (long) filter?

Clay, this is a chart I made for comparisons:

 

[swathdiver]

Update....

Ok, It's been a little over 600 miles now. The oil pressure once warmed up is about the same as before now, maybe 1-2 psi higher across the board, cold start, hot, etc. What hasn't changed it the rattle or piston slap, it's still gone with this oil. Fuel economy has improved slightly but only one tank to go by so far. Time will tell.

Guess I was a little too excited and forgot that most oil delivers higher pressures when new compared to the stuff you just got rid off!

 

[swathdiver]

I may be switching over to ls30. I too was using valvoline but switched back to Mobile one and pressures cold and hot are much better but after reading the ls30 specs I am going to be giving it a try before my first tow next weekend.

I looked this up today and the viscosity specs are little different from regular Mobil 1 5W30. However, it is a Group IV based oil, like M1 used to be before 2010. Still "thinner" then the stuff I just bought and more than 3X as expensive.