What 5W-30 oil brand are you using for the 6.6L gas?

[Dustin Marshall]

To answer the OP's question, I use Pennzoil Platinum 5w-30 (Dexos1 Gen 3) w/ an AC Delco PF63 filter.

I'd use Pennzoil Ultra Platinum, but interestingly the Ultra Platinum is not Dexos1 Gen3.

 

My second choice would probably be Valvoline Extended Protection, but I've had great results from the Pennzoil natural gas derived Platinum oils to use anything else.

[64BAwagon]

4 hours ago, Grumpy Bear said:

 

Hello Scott: 

 

Have a read and pay attention to the comparison box: Dexos 1 Gen 2 vs Gen 3: The Ultimate Comparison (rally-america.com)

 

Note that there was NO LIMIT to the amount of Group II/II+ fluids that were allowed in Gen 2? Yea, a Dexos license in an oil that had been around since what, the 1970's. Now a 30% limit. Of course, oxidation and sludge will improve. 

 

Note that not only is there a limit on deposit control but there is a MINIMUM as well???? 

 

Mostly Gen3 allows the addition of 0W16 oils and a modest improvement over one or two SAE SP standards. 

 

SAE SP oils ALSO have a 0.8% ask cap and must meet a 15% maximum NOAK. Gen 3 is 12.5%.  Gen3 and SAE SP have lowered the average TBN. Because of improved base oil mix MAYBE but how will that play out in an OCI? 

 

Pretty sure  is not the answer you are looking for, but it is the one I have. Actually, I can do better. Test the use oil. 

 

When the object is simple the test can be as well. IF you are willing to pay for both a TBN and TAN then don't let them cross. TBN falls, TAN rises. If not and the test only gives a TBN or you don't want to pay for a TAN then set 4 as the floor. Keep an eye on fuel and viscosity as well. Blackstone is cheap and will run a TAN with the base kit for a small fee. Oil Analyzers is also inexpensive. Send a sample at 3K but keep driving until you get the results. if good test again at 5K. FIND the limit of the oil you choose. 

 

I have no rabbit to pull from my hat. I get 5K out of Red Line HP Euro. Another member here gets about 2.8/3K from the same oil in a different motor. It really is case by case. 

 

 

Thanks, I kinda figured that might be the case.

Considering what I paid for the oil it would cost more for an analysis than it would to change the 8 qts and a new AC filter. So I will keep the intervals on the low side (around 40% min on the OLM) and go on with the rest of my life without oil worries. 

[Grumpy Bear]

2 hours ago, 64BAwagon said:

Thanks, I kinda figured that might be the case.

Considering what I paid for the oil it would cost more for an analysis than it would to change the 8 qts and a new AC filter. So I will keep the intervals on the low side (around 40% min on the OLM) and go on with the rest of my life without oil worries. 

 

I'm often surprised by how far a particular oil won't go than how long it will.  

 

I had routinely and for decades gone 7.5K on Red Line HP in Honda's with SPFI systems. Stunned 5K was knocking on heaven's door in the GDI V6. (TBN) Rubbed my eyes in disbelief to see Pennzoil Ultra Platinum Euro 5W40 be unusable by 1,700 miles in a Hell Cat Hemi! Sheared out a full grade. 

Edited August 21, 2023 by Grumpy Bear

[Black02Silverado]

On 8/21/2023 at 9:11 AM, 64BAwagon said:

So acknowledging all that what are your thoughts on Dex1G2 vs Dex1G3 ?  I have at least 3 oil changes of G2 left over that I will use in my 6.6 gas HD. Does the G2 designation warrant a shorter OCI ? I typically change at 5k due to the amount of towing I do. 

I dont do analysis on a regular basis on my own vehicles other than the occasional instance when I feel like I need to validate a choice. The only time I did one for oil change extending was on my LLY durmamax. I ran that one out to 12k with Delvac syn 5W40 and it still wasnt anywhere near condemning. 

 

Thanks

Scott

Scott,

 

Use the G2 with confidence.  No worries.  Just curious but do you still have the results of the tested Delvac?  If so can you post them in the used oil analysis section?

[Black02Silverado]

On 8/15/2023 at 9:50 AM, SoCal Angler said:

Getting prepared for the first oil change at 500 miles, as I will begin towing after 500 miles.  Manual calls for an oil change before towing.

 

What brand of 5W-30 are you using?

 

I found:

The Dexos 1 brand is difficult to source anywhere other than local dealer.

Costco sells Mobil 1 that has the Dexos 1 approved label on the bottle.

Is the Mobil 1 preferred if the Dexos 1 is not available or double the price?

 

I'll be using the AC Delco PF63 oil filter.

 

Thanks

 

As posted above, most of the oils off the shelf at your local auto parts are now the new dexos specification.  If  you are interested in trying AMSOIL let me know.  I can get you a quote for an oil change delivered to your door.  Just let me know.

[customboss]

I am running the Mobil FULL Syn version of DEXOS1 V 3  ( this is AC DELCO 5w30 Dexos1 V3)  on my 8th test run on the L3B 2022 LTD 4 popper turbo and its over total machine miles @ 40,000 miles now. 

 

Looks like this engine eats oil beginning roughly at 4000 ish miles NO matter what oil is used. 

 

I suspicion sliding wear with the 4 cyl to 2 cylinder mode at cruise is the culprit permanently damaging the additives that make crappy base oils work longer.

 

I also have determined the engine holds more than 6 qts for a change. So many of us might be underfilling the sump at oil change day. 

 

The Amsoil OE 5w30 that Black02Silverado sent me went the farthest tested @ ~ 7000 miles last year (when I met Grumpy Bear in Illinois and bought him lunch )  but consumed a qt of oil it was driven hard coming home too.

 

  

Test 7 I ran QS synthetic 5w30 and 1 qt of RLI BIOSYN 5w20 HD low ash with some great results while driving 75-80 mph on highway 3400 miles and then off road as is normal here for about 6100 miles.  Consumed ~ 3/4 qt. 

 

 

 

 

[diyer2]

Hey Boss, good to hear from you.

Oil consumption is a crapshoot. My 12 5.3 uses a little between OCI's. 74 k miles.

Amsoil OE stopped a little oil usage in our 19 Hyundai Santa Fe. 

[customboss]

15 hours ago, diyer2 said:

Hey Boss, good to hear from you.

Oil consumption is a crapshoot. My 12 5.3 uses a little between OCI's. 74 k miles.

Amsoil OE stopped a little oil usage in our 19 Hyundai Santa Fe. 

Good to hear from you fellow Colorado driver. 
Another issue with the 2.7 is the two inside cylinders are off in most driving on road. The folks who defeat that with L range of trans or just hard driving  have less oil consumption.  
I’m testing using L range more to see if it helps. 
Up here I’ve been mixing 85 octane regular at about 11 gallons for a 24 gallon capacity with E15 to get better MPG. This engine doesn’t care what octane I use. Timing in 2 cyl ops is negative or 0. 
cheers fellow L3B folks. 

[SoCal Angler]

On 8/22/2023 at 11:05 AM, Black02Silverado said:

As posted above, most of the oils off the shelf at your local auto parts are now the new dexos specification.  If  you are interested in trying AMSOIL let me know.  I can get you a quote for an oil change delivered to your door.  Just let me know.

 Thanks for the offer.  I currently have an Amsoil membership.

[VicFirth]

 

 

Sulfur levels are so low in fuel that TBN isn't even considered a valid test per GM and Cummins.  GM dismisses it entirely.  

 

Edited November 4, 2023 by VicFirth

[VicFirth]

"Excess TBN brings nothing to a lubricant except added cost; It can even contribute to ash formation."

For HDMO:

In the past, a high TBN was needed to combat and neutralize the high-sulfur fuels in use, which would generate significant amounts of sulfuric acid. But with this evolution, we’re seeing inherently lower TBNs in the field today. Essentially, while TBN may now appear to deplete more quickly, this is a reflection of upgrades in HDMO formulation chemistry and not the health of the remaining oil.

 

Total Base Number: How low can YOU go? | Afton Chemical

 

"TBN in an oil is primarily derived from the over based metallic detergents in an engine oil. One of functions of these detergents is to neutralize the acids formed by the oxidation of base oil. And this is where TBN gets to be a poor predictor of oil life. 10 TBN's worth of detergent in a Group I oil (old fashioned mineral base oil) will be depleted much more quickly than 10 TBN's worth of detergent in a Group III based oil (severely hydrocracked base oil). Put simply, if the base oil resists oxidation, it doesn't form carboxylic acids and so makes no call on the TBN reserve. The other thing is that TBN depletion isn't usually linear. On industry standard tests like the 100 hour/150°C Sequence IIIG, TBN usually depletes exponentially and in severe cases you might find that half way through the test, the entire TBN reserve has be used up, such that oxidation resistance is carried by supplementary Antioxidants in the oil.

 

One other thing... Most folks would consider an engine oil to be shot when the TBN reaches 2 - 3. This isn't actually the case. An oil can function quite happily with a TBN of zero. The thing you have to remember is that oil formulators don't tend to focus directly on stuff like TBN depletion, acid formation or oil oxidation. What they're really concerned with is the onset of exponential viscosity increase. For many of the lengthy, industry standard engine based oxidation tests, it's both impractical and uneconomic to just use over based detergent to control oxidation. Given how fast it can deplete, you might need an oil with a starting TBN of around 20 to keep the TBN above 2 at the end of the test! For this reason, modern oils contain a cocktail of various Antioxidant chemistries, each of which plays a role in keeping the oil from 'breaking' long after the TBN reserve has been exhausted. Just to be clear, there's nothing wrong per se with changing out your oil when the TBN hits 2 - 3 but if you do a UOA, and find the oil's TBN is zero, it's not something to freak out about."

Edited August 24, 2023 by TunaFresh

[VicFirth]

"A lot of folks misunderstand the logic for putting over-based metallic detergents in oil (the stuff that largely gives an oil its TBN & the bulk of its Ash). It has almost nothing to do with 'cleaning' or high sulphur fuels. The first 5 TBN is usually there for rust prevention as defined by the Ball Rust Test. This might get raised to about 8 TBN to neutralise the complex carboxylic acids that form when base oils oxidise as they get exposed to hot, reactive blow-by gas. Typically 8 TBN is way too much for oil in normal service but it would definitely all get used up in the severe industry oxidation tests like the Sequence IIIG.

There's no harm in buying oils with 10+ TBN but TBH, there's not a lot of benefit to be gained either. The fact is that modern base oils (Groups II/III/IV/V) are massively more resistant to oxidation than old fashioned Group Is. If they're not breaking down, then there's nothing for the detergent to neutralise, so any excess just sits in the oil, doing naff all, until it's time to throw the oil away."

[nitro882]

On 8/22/2023 at 2:05 PM, Black02Silverado said:

As posted above, most of the oils off the shelf at your local auto parts are now the new dexos specification.  If  you are interested in trying AMSOIL let me know.  I can get you a quote for an oil change delivered to your door.  Just let me know.

I don’t have a 6.6l gas but if i did Amsoil would be what would go in it. It will be in my new Duramax for sure. 

[Dunn]

On 8/22/2023 at 3:34 PM, customboss said:

I am running the Mobil FULL Syn version of DEXOS1 V 3  ( this is AC DELCO 5w30 Dexos1 V3)  on my 8th test run on the L3B 2022 LTD 4 popper turbo and its over total machine miles @ 40,000 miles now. 

 

Looks like this engine eats oil beginning roughly at 4000 ish miles NO matter what oil is used. 

 

I suspicion sliding wear with the 4 cyl to 2 cylinder mode at cruise is the culprit permanently damaging the additives that make crappy base oils work longer.

 

I also have determined the engine holds more than 6 qts for a change. So many of us might be underfilling the sump at oil change day. 

 

The Amsoil OE 5w30 that Black02Silverado sent me went the farthest tested @ ~ 7000 miles last year (when I met Grumpy Bear in Illinois and bought him lunch )  but consumed a qt of oil it was driven hard coming home too.

 

  

Test 7 I ran QS synthetic 5w30 and 1 qt of RLI BIOSYN 5w20 HD low ash with some great results while driving 75-80 mph on highway 3400 miles and then off road as is normal here for about 6100 miles.  Consumed ~ 3/4 qt. 

 

 

 

 

2500s are 8qts with a filter.....what manual says

 

Definetly not how much came out though when I changed oil today

 

My oil was pretty dirty so will be doing 4k miles intervals

 

Castrol edge is what I had, so used it up.....depot has it and am there on daily basis...not super picky about it....use good oil and keep it cleanish....went on bender over oil racing dirt bikes but got over it

 

Cool thing about HD is their so tall its easy to do, filter and drain are easy accessible  make sense unlike the 1500s...

 

 

 

 

 

 

 

 

Edited August 25, 2023 by Dunn

[Grumpy Bear]

 

 

If you think oil consumption is the add pack wearing out (viscosity shear down) try this 5W30:

 

No-VII-Engine-Oil-PDS.pdf (hplubricants.com)

 

No VII additives and the add package meets/exceeds the DEXOS1Gen3 performance standard even though it has a higher alkalinity starting point. Thank you more Mg less Ca. Meets Gen3 SAPS. Should get you your money's worth. 

 

This is a Group III/ Alkylated Naphthalene /Ester blend. AN/Ester gives it enough polarity to actually clean over time. 

Group III/AN synergy provides a higher oxidation initiation temperature that either alone. Higher than a straight PAO. 

 

What it is not. It is not a low HTHS oil. That's good for wear but gives up a small amount of fuel efficiency that most will never ever notice even over long-term trending. It does not run at the bottom of the SAE grade spec on 100C/212F viscosity as is the Gen3 trend. In other words, it is not a fat SAE 20 with a SAE 30 label. It is 'say in grade'.