Which engine oil do you use?

[swathdiver]

For starters I drive a 2006 GMC Yukon denali xl, LQ4 6.0.

i wasn’t really sure wether or not to post this here or the engine/drivetrain category. So if this is the wrong place sorry haha.
But I was just curious as to what kind of oil you guys use, I’ve been running royal purple for every oil change for about a year now, and was looking at other options. I figured what better place to look for advice than the forum with the same people and the same LS trucks as me.

anyways, what is the oil you guys use and why? thanks in advance if I don’t reply quickly!

Well, you already have the best, so if cost is an issue, I would suggest Rotella Gas Truck. If you want to pick up another mpg, change your trans fluid using Royal Purple or Red Line synthetic.

I picked up about a quarter mpg by switching off of plain M1 to ACDelco full synthetic. No more rattles on start up and the Blackstone Labs report is better too. Rotella Gas Truck has similar numbers and when the supply of my favorite oil dries up I'll switch to that.

 

[Bob2C]

Well, you already have the best, so if cost is an issue, I would suggest Rotella Gas Truck. If you want to pick up another mpg, change your trans fluid using Royal Purple or Red Line synthetic.

I picked up about a quarter mpg by switching off of plain M1 to ACDelco full synthetic. No more rattles on start up and the Blackstone Labs report is better too. Rotella Gas Truck has similar numbers and when the supply of my favorite oil dries up I'll switch to that.

Picked up 10 gal of gas truck when advance auto was giving it away for 2.50/qt. Absolute bargain.


Sent from my iPhone using Tapatalk

 

[bill1013]

Doesn't that get expensive? I mean dinosaurs must eat a ton of feed & veggies everyday. Just saying...

 

[S33k3r]

FWIW, my mechanic uses AC Delco full synthetic on our GM vehicles, which I believe is actually Mobil rebranded. On our Fords, he uses Motorcraft which I also believe is a rebrand, but of what I am unsure.

The little bit of research I've done on the topic indicates Amsoil is, hands down, the best oil you can buy. Do you need all the features it offers at that price point though? I do not. Or, at the least, do not believe I do...

In case that helps.

 

[BlackLTZ985]

View attachment 261467

Been tempted to start using royal purple. I’ve been using cheap autozone 5w30 and half a bottle of Lucas treatment.
Does anyone know if royal purple has detergent.

 

[Dantheman1540]

This is such a debated topic full of opinions so here's mine.

I always use a full synthetic typically a thick oil on anything that is higher mileage or beat hard. My Tahoe is currently on 15-40 Rotella T6 because it was super cheap at Walmart and I believe it is a quality oil. All the engines I've pulled apart that I have run a full synthetic on for a few oil changes are surprisingly clean despite often having very high miles. I also like to run some sort of oil stabilizer like Lucas if the engine has piston slap on cold starts or any aggressive valve train noise. My Tahoe often has a few seconds of piston slap in the morning and since I started running half a jug of Lucas with each oil change it has eliminated it 9/10 cold starts. It gives me a little more peace of mind knowing I have a decently large cam with unknown mileage and brand lifters. Oil change interval on the Tahoe is somewhere between 3-7k miles but I check it weekly.

On my "Race truck" that I have a lot of money in the engine I am a little more lax on the brand of oil because I don't intend to run it nearly as long as I do in my Tahoe. It will never see more than 3k miles on an oil change because I am **** about opening the filters and seeing the health of the engine. I typically still run a full synthetic but won't bat an eye at buying bulk Amazon Basics full synthetic. Maybe thats dumb but I have never seen any indication of excessive wear due to cheaper oil.

 

[Mudsport96]

This is something I've wanted to put in one of these threads for a very long time. This was at my local store, white sticker paper with oriellys high mileage on it over mobile super high mileage. They had run out of house brand and apparently mobil makes their oil so they were just selling the mobil at house brand prices

 

[exp500]

PBR and OLD MIL are same, just a different can, OM $1.00 6 pack less. Warren packages many of the Oils sold as Store or Chain Brands.
Know what you are buying!

 

[TheAutumnWind]

Castrol Edge 0w40 Euro Spec
https://www.amazon.com/Castrol-03101-0W-40-Advanced-Synthetic/dp/B00JGQLZSU

I've heard a lot of good things about this stuff. Think I am going to give it a shot on my next oil change. I've always been one to just use whatever full synthetic is on sale and a quality filter.

 

[Mudsport96]

PBR and OLD MIL are same, just a different can, OM $1.00 6 pack less. Warren packages many of the Oils sold as Store or Chain Brands.
Know what you are buying!

Location location lol. PBR is 8.99 here cant get Old Mil at the store but the old gas station up the road has a couple 12 packs lol.
As for oil, yeah I learned years ago the Walmart brand was made by valvoline for a few years then havoline. Who knows now, but for the most part as long as you have a reasonable OCI any oil will suffice.