Synthetic vs conventional

BigSachsy1 · Nov 10, 2024

05 tahoe, 142k miles on the engine. I got my oil changed today and (as far as I know) it has always been 5w30 conventional. So me and one of the techs started talking about his tahoe. He charged me 71 bucks for it, which is the price for the standard conventional oil change. I got home and looked at the receipt and it says duramax 5w30 synth blend. Thoughts? Stuff to worry about? Wanted to get some more info other than what I've already gleaned online before I go back and talk to them, if I even have to do so. Thanks in advance.

Fless · Nov 10, 2024

You sure it doesn't say "DexOS" instead of "duramax"?

BigSachsy1 · Nov 10, 2024

Fless said:
You sure it doesn't say "DexOS" instead of "duramax"?

Yes I'm positive

Scottydoggs · Nov 10, 2024

so glad i can still do my own oil changes. 71 bucks seems like a lot to me. thats like double the cost of materials. and you know they pay less for everything vs buying it your self.

i use mobil one full syn 5-30. 25 bucks for a 5 qt jug at wally world. i end up buying 3 jugs to do my camaro, 8 qts, and the hoe, 6 qts. leaves me a qt to top off one if need be.

Marky Dissod · Nov 10, 2024

BigSachsy1 said:
05 tahoe, 142k miles on the engine.
I got my oil changed today and (as far as I know) it has always been 5w30 conventional.
So me and one of the techs started talking about his tahoe.
He charged me 71 bucks for it, which is the price for the standard conventional oil change.
I got home and looked at the receipt and it says duramax 5w30 synth blend.
Thoughts? Stuff to worry about?
Wanted to get some more info other than what I've already gleaned online before I go back and talk to them, if I even have to do so.

Unless your Tahoe works or plays unusually hard, so long as you change your oil every 5000 miles or less, it likely does not matter anymore what 'synthetic' motor oil your vehicle is using.

If the motor oil is good enough for a DuraMax (or even a DuraMedium 6-inline, or DuraMini 4-inline),
it's likely good enough for 'non-severe duty' uses in your Tahoe.

Fless · Nov 10, 2024

If I was in this position, I'd go back there and ask what specific oil they put in it. Unless it's compatible with gas engines, diesel oil can ruin catalytic converters and cause other issues. It might not matter for one oil change, but knowledge is power. What they put in might be okay, or it might not.

Diesel Oil in Gas Engine-Will It Hurt My Engine?

Is it OK to put Diesel oil in my gas engine? When is diesel oil bad for my car? Do I need to any additives in addition to diesel oil in my gas engine?

www.speedwaymotors.com

Marky Dissod · Nov 10, 2024

Fless said:
... Diesel oil can ruin catalytic converters and cause other issues.

IFF your engine burns oil, then yes, you want your engine to burn the cleanest possible oil.
If not, then this is not an issue.

Fless · Nov 10, 2024

Marky Dissod said:
IFF your engine burns oil, then yes, you want your engine to burn the cleanest possible oil.
If not, then this is not an issue.

At 142K I suspect that there's some oil being burned. How much, only one who tracks that would know.

Mudsport96 · Nov 11, 2024

So probably not Duramax diesel oil... but DuraMAX off brand generic oil. No experience with it so I can't Comme t on quality. But, I would do some googling and see what people's experiences are with it.

S33k3r · Nov 13, 2024

Just need to figure out who the underlying manufacturer is.

Synthetic vs conventional

BigSachsy1

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Marky Dissod

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Diesel Oil in Gas Engine-Will It Hurt My Engine?

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