Is this a good deal on Castrol GTX?

No, it says synthetic blend on the container. It's the white jug of Castrol GTX Ultraclean.
Yes, GTX Ultraclean is a synthetic blend that carries the up to date API SP spec. It's a good oil for the price and I use it too.

Over here we get two types 10W30 that is SP and GF-6, and 15W40 that is SP/SN and Euro A3/B4.

I run it 5-6k miles.
 
I don't know the composition but the 5W-30 says Synthetic blend on the bottle and the 10W-30 does not. However, the PDS for the 10W-30 does claim that the product contains premium synthetic technology, whatever that means.
 
I don't know the composition but the 5W-30 says Synthetic blend on the bottle and the 10W-30 does not. However, the PDS for the 10W-30 does claim that the product contains premium synthetic technology, whatever that means.
Chevron says group 2&3 blend on their pds.
White bottle GTX API is likely a group 2 product. The 10w40 and 5w30 grades will have more of the dreaded viscosity improvers than the 10w30 and 20w50 grades.
My daughter’s 2022 3.6L Acadia has plain Jane GTX 10w40 in it for the last 3 oil changes.
She wants a suspension kit for Christmas.
We’ll have to wait and see what Santa brings.
Rough Country has them for under a thousand.
 
If it says "GTX Ultraclean" then it should be a semi-synthetic.
If it just say "GTX" then the 5W30 will still be a semi-synthetic to meet API SP, but the 10W30 could be a mineral.

OP, do you have the Ultraclean version ?
 
If it says "GTX Ultraclean" then it should be a semi-synthetic.
If it just say "GTX" then the 5W30 will still be a semi-synthetic to meet API SP, but the 10W30 could be a mineral.

OP, do you have the Ultraclean version ?
Here is what I got. Apparently the 10W-30 doesn't carry the Ultraclean name or the synblend label on the jug.

url jr..webp
 
OK, so the 5W30 is a semi-synthetic, and the 10W30 is a conventional (mineral) oil. Both are API SP.

This matches what blenders here have told me. A 5W30 needs thinner base stock to meet 5Wx, and some of this would need to be synthetic (Group-III) to meet other SP requirements like the Noack volatility limits. However a 10W30 can be made with thicker base stock to meet 10Wx, and it would naturally have lower Noack, so it can be all Group-II.

This shows how good the modern API SP standard is, and any oil that carries it is a good oil.

It also shows that being synthetic is more important for thinner and 0Wx oils, and why old school 15W40 HDEOs performed so well in their heavy duty applications.

In Australia we get Castrol GTX 15W40 for cars that has both American API SP and Euro ACEA A3/B4 specs, it's a mineral and it's as cheap as chips. You can bet any car sold in Australia has a significant amount of owners running a dual rated mineral 15W40 in it. Given our hot climate we can run this year round. Given that our traditional birth right oil is 20W50, this 15W40 is also our modern thin economy oil.

I was at a fuel station recently, and a guy in a nice business suit with a new shiny Audi pulled up. I assume he had a low oil light showing. He just ran to the store, grabbed a 1L (~quart) of conventional 15W40, poured it in and drove on. I'm sure of two things, no - it didn't carry the correct VW specs, yes - his car will be completely fine.
 
The product is Castrol GTX 10W-30 in the white jug. I am presented with the option to purchase at $10 per 5 quart container. They come 3 jugs per box and the seller wants to unload an entire pallet. Is this stuff worth $10 a jug for vehicles that require nothing more than API SP/ILSAC GF-6? It seems to sell for $22.99 at most places to include WalMart.

I am certainly not buying the entire pallet but a few cases could come in handy if the product is worth it. What do you guys think?
IMO clearance oil is the real deal 🙊🙊
 
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