Here's a search for 12 packs of oil jugs [costco.com] if you'd rather get them.
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expired Posted by HappyPixel • Apr 9, 2025
Apr 9, 2025 10:45 AM
Item 1 of 2
Item 1 of 2
expired Posted by HappyPixel • Apr 9, 2025
Apr 9, 2025 10:45 AM
Costco Members: 4-Pk 5-Qt Kirkland Signature Full Synthetic Motor Oil (various)
+ Free Shipping$54 each
$70
Costco Wholesale
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The stuff sold at a price point (bargain basement) will meet API SP and dexos1 will have a treat rate of about 8.5% wt in the engine oil. Treat rate is the focus for products sold under a bid as the additive is sold by the ton, the less you use the cheaper the product. The more premium stuff will meet ACEA, MB 229, VW 501, etc. and have a treat rate of closer to 13%.
Now the clincher for me is that cheap additive package will pair with a cheap viscosity modifier (VM), the stuff that makes it a 0W-xx, usually some olefin copolymer (OCP). These are what I refer to as dirty polymers because they tend to leave more deposits as they break down (piston walls, skirts, rings, turbo bearings).
Those premium packages because they need to pass more stringent Euro specs will use a styrenic type polymer usually a star polymer which is a cleaner and more shear stable VM. This helps us keep the pistons cleaner = less scuffing, blow by, better power, better fuel economy, and these days more importantly a cleaner turbo as those are very hard on oil.
In the end the cheap stuff will not kill your engine, but much like living on ramen noodles and McDonalds it isn't going to make that engine stay at like new performance. I used to formulate this stuff before I retired so happy to answer questions.
Lower viscosity in the US is for CAFE reasons, not motor longevity.
page 8 and 9
https://engineoil.api.o
Warren Oil
https://www.warrenoil.c
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Our community has rated this post as helpful. If you agree, why not thank ghettoroadster
There are only 4 companies in the world that make the additives that go in oil.
https://youtu.be/e8dCFcF0qBQ?si=
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I have seen a lot of my customers with issues on newer Toyotas.
They have had a lot of growing pains in the last 5 or so years. My worry is not just now but 10+years/100k+ from now.
Even Honda has had issues. So no manufacture is immune but some think old Toyota is the same as new.
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