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
Made by
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page 8 and 9
https://engineoil.api.o
Warren Oil
https://www.warrenoil.c
Made by
Today, I bought Kirkland Signature 5W-30 Full Synthetic Motor Oil 5-quart, 4-pack (qty: 3) for $176 with tax (i.e, twelve 5-quart bottles). Two extra bottles for the same price compared to two years ago.
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I agree that Toyotas are one of the longest lasting cars on the road.
And they rarely need repairs if maintained.
But easy to work on?
Maybe I just got REALLYYYYYY unlucky.
But I am not exactly a newb in the shop. And after an RX350, Rav4, ES330 and Tundra, I have yet to find one that does not just about require an exorcism to get to anything.
5W-30 also on sale for same price
https://www.costco.com/kirkland-s...90432.html
Mix of two packs of 0W-20 and two packs of 5W-30
https://www.costco.com/kirkland-s...91506.html
https://www.costco.com/kirkland-s...87280.html
It would probably work but may not be the correct one.
It's not really hard to hang onto the book and look.
I prefer throwing the books in a drawer in my garage because my time saved searching the internet vs. opening a small book to get the correct oil.
to each their own.
There are only 4 major companies in the that make the additives that go in oil.
https://youtu.be/e8dCFcF0qBQ?si=
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Or, pack everything up and head to a good Lowes w knowledgeable folk, an ace or local sales/repair for saws/garden shop and just ask
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