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

[customboss]

59 minutes ago, asilverblazer said:

So some members here are well versed in oil... I struggle with to what end?

How many cars on the road today last over 200k miles using whatever brand, type (synthetic/non-synthetic/regular/blend) in the correct viscosity, at recommended change intervals? I'm thinking the generic time to change my oil, I'll go to where ever, or buy what's on sale types.

 

I just don't see this overwhelming collection of vehicles suffering catastrophic engine failures from using a 'bad' oil - that otherwise have a 'considerable' amount of life left in them.

 

The vehicle usually disintegrates around the engine. Body damage, faded paint, worn interiors, failing plastics, rust, crashes, etc. seem to condemn any vehicle before the 'I should have used a different oil' ever does. 

 

...NOT criticizing, just what's the interest here?

 

Come join and I’ll show you. 

[asilverblazer]

1 hour ago, customboss said:

Come join and I’ll show you. 

Time - what am I getting for my time? 

I LIKE talking about trucks, NOT metallurgy of frames or foam density in seat cushions or oil additives and friction modifiers and viscosity tests.

 

So what am I gaining in this education? How am I benefitting? 

 

Rather (this sounds lazy, or under appreciative) why can't someone who has done this exhaustive amount of research and has this greater understanding just boil it all down and say, "I recommend this product, because..."

 

Don't worry I joined too.

[KARNUT]

3 hours ago, asilverblazer said:

So some members here are well versed in oil... I struggle with to what end?

How many cars on the road today last over 200k miles using whatever brand, type (synthetic/non-synthetic/regular/blend) in the correct viscosity, at recommended change intervals? I'm thinking the generic time to change my oil, I'll go to where ever, or buy what's on sale types.

 

I just don't see this overwhelming collection of vehicles suffering catastrophic engine failures from using a 'bad' oil - that otherwise have a 'considerable' amount of life left in them.

 

The vehicle usually disintegrates around the engine. Body damage, faded paint, worn interiors, failing plastics, rust, crashes, etc. seem to condemn any vehicle before the 'I should have used a different oil' ever does. 

 

...NOT criticizing, just what's the interest here?

 

My brother in law routinely gets over 250K miles out his large GM SUVs. His daily work vehicle a Tahoe has 255K its an 08. His wife’s Yukon has 175K. I saw both vehicles this weekend. He gets whatever Auto Zone has on sale when they hit the 5K mark. Normally when he’s ready he gets her a used one with around 25K miles. He gets hers. We had a salvage yard in the 80s. Usually people would drive in cars to sell us. It would cost too much to get them through emissions was usually the reason. 

[VicFirth]

I read Mobil 1 ESP 5w30 could be using mPAO and a diblock polymer.  

 

 

https://www.infineuminsight.com/en-gb/articles/the-diblock-advantage/

 

In this series, the Mobil 1 held its viscosity the best.

 

Edited March 10, 2025 by VicFirth

[Antny]

On 2/4/2025 at 12:49 PM, Pryme said:

How much oil were you burning before? Shell 93 is what I run in my bike but no way I’m spending that coin on a HD pickup. And RP oil is crazy expensive too. So you traded burning oil for burning cash. 

 

On 2/4/2025 at 12:49 PM, Pryme said:

How much oil were you burning before? Shell 93 is what I run in my bike but no way I’m spending that coin on a HD pickup. And RP oil is crazy expensive too. So you traded burning oil for burning cash. 

Before I switched to RP and Shell Nitro+, I was burning a quart around every oil change interval or sometimes 1,000 - 1,500 miles with cheaper synthetic oil and regular 87 octain fuel. New vehicles today I think, are designed to fail and it's almost like a second job to keep up with this stuff. I kind of enjoy it though. LOL Crazy. It's important to note that the extra money I spend on the fuel and oil is money that is save from the problems that will result from burning oil in the combustion chamber and circulating fuel and carbon in the crankcase over time. To me, adding a quart over and over is like slapping coat after coat of paint on a rotting house frame. I know vehicles have always burned oil, but the amount of money these vehicles cost today is a different story.

[Pryme]

48 minutes ago, Antny said:

 

Before I switched to RP and Shell Nitro+, I was burning a quart around every oil change interval or sometimes 1,000 - 1,500 miles with cheaper synthetic oil and regular 87 octain fuel. New vehicles today I think, are designed to fail and it's almost like a second job to keep up with this stuff. I kind of enjoy it though. LOL Crazy. It's important to note that the extra money I spend on the fuel and oil is money that is save from the problems that will result from burning oil in the combustion chamber and circulating fuel and carbon in the crankcase over time. To me, adding a quart over and over is like slapping coat after coat of paint on a rotting house frame. I know vehicles have always burned oil, but the amount of money these vehicles cost today is a different story.

Running quality oil I can get behind. Running premium in a vehicle spec’ed for regular is not only wasting money but actually doing the opposite of what you think. Will probably create more deposits because of incomplete burn. 
 

like I said I run it in my bike because it’s spec’ed for it being it has 12.2:1 comp ratio and revs to 12k plus rpm. But these trucks don’t need premium and they are designed to run on 87. 

Edited May 22, 2025 by Pryme

[Grumpy Bear]

2 hours ago, Pryme said:

Running quality oil I can get behind. Running premium in a vehicle spec’ed for regular is not only wasting money but actually doing the opposite of what you think. Will probably create more deposits because of incomplete burn. 
 

like I said I run it in my bike because it’s spec’ed for it being it has 12.2:1 comp ratio and revs to 12k plus rpm. But these trucks don’t need premium and they are designed to run on 87. 

 

@Pryme... I think @Antny use of Shell V Power Nitro + has to do with the Anti-wear additive used in this fuel. 

 

It will burn as complete as the 87. This Shell fuel and Exxon/Mobil Synergy Supreme + both have an Anti-wear additive other fuels do not. Not even their own lower octane fuels. They both also have multiples of even the Top Tier fuels detergents. Deposits due to fuel....not an issue. IMO of course. 

 

 

[Pryme]

35 minutes ago, Grumpy Bear said:

 

@Pryme... I think @Antny use of Shell V Power Nitro + has to do with the Anti-wear additive used in this fuel. 

 

It will burn as complete as the 87. This Shell fuel and Exxon/Mobil Synergy Supreme + both have an Anti-wear additive other fuels do not. Not even their own lower octane fuels. They both also have multiples of even the Top Tier fuels detergents. Deposits due to fuel....not an issue. IMO of course. 

 

 

I was under the assumption 87 burns hotter and quicker and running premium when not called for would cause an incomplete burn. 
 

also make sure your shell station didn’t quietly go adding ethanol to their vpower. I used to run shell in my bike until this spring I pulled up to the pump and it now says up to 10% ethanol in the premium. It never was before. So I no longer go there. 
Kwik trip and fleet farm have no ethanol in their premium still. 

[Grumpy Bear]

1 hour ago, Pryme said:

I was under the assumption 87 burns hotter and quicker and running premium when not called for would cause an incomplete burn. 
 

also make sure your shell station didn’t quietly go adding ethanol to their vpower. I used to run shell in my bike until this spring I pulled up to the pump and it now says up to 10% ethanol in the premium. It never was before. So I no longer go there. 
Kwik trip and fleet farm have no ethanol in their premium still. 

 

I've cracked a few million gallons of gasoline.  Literally, in an FCC. Made as much Aviation fuel components. Isomerization Unit. Everyone has there preferences. I won't impose mine you you. 

 

Me, I run those fuels for the anti-wear and detergent packages. Runs very clean. Less KR even in those motors that don't require it. I love alcohol fuels. Pepper lives on E-85 at 100+ octane and yet only requires 87. That motor is really clean. Octane rating and cleanliness are not related. That much is not opinion. 

 

Enjoy your evening. 

 

 

 

 

[OS RR]

AC Delco Dexos 3 5w-30

[Pryme]

15 hours ago, Grumpy Bear said:

 

I've cracked a few million gallons of gasoline.  Literally, in an FCC. Made as much Aviation fuel components. Isomerization Unit. Everyone has there preferences. I won't impose mine you you. 

 

Me, I run those fuels for the anti-wear and detergent packages. Runs very clean. Less KR even in those motors that don't require it. I love alcohol fuels. Pepper lives on E-85 at 100+ octane and yet only requires 87. That motor is really clean. Octane rating and cleanliness are not related. That much is not opinion. 

 

Enjoy your evening. 

 

 

 

 

Ethanol does gum up in small engines over winter that’s a fact I’ve seen it multiple times. 
 

ever since I went ethanol free I’ve had zero issues in equipment that sits for months unused. 
 

That’s the sole reason I use it in my small engines. Pure gas keeps longer. 

[customboss]

4 minutes ago, Pryme said:

Ethanol does gum up in small engines over winter that’s a fact I’ve seen it multiple times. 
 

ever since I went ethanol free I’ve had zero issues in equipment that sits for months unused. 
 

That’s the sole reason I use it in my small engines. Pure gas keeps longer. 

In sealed gasoline systems it’s fine
 

Agree on open systems

[Grumpy Bear]

On 5/23/2025 at 8:57 AM, Pryme said:

Ethanol does gum up in small engines over winter that’s a fact I’ve seen it multiple times. 
 

ever since I went ethanol free I’ve had zero issues in equipment that sits for months unused. 
 

That’s the sole reason I use it in my small engines. Pure gas keeps longer. 

 

You are correct...for small engines. Especially 2 stroke motors but anything with a diaphragm in the carburetor. They are not designed for it. Your truck motor is. 

 

 

Edited May 24, 2025 by Grumpy Bear

[Kevin Sheehan]

I started using Mobil 1 Truck + SUV 5W-30. Can't find it in the store. Usually order on WalMart.com or a mid-west farm store. About $28-$30 for 5 quart container. Still burns quicker when towing as the manual says it would.

[Black02Silverado]

On 2/21/2025 at 1:28 PM, Another JR said:

Thank you for responding. I’m wondering if your response implies you see switching to Mobil One as a step down in oil quality or suitability. 

Don't know how I missed this, but to me it's a step sideways for the most part.