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 • Last Wednesday
Apr 9, 2025 10:45 AM
Item 1 of 2
Item 1 of 2
expired Posted by HappyPixel • Last Wednesday
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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Look in your book. Probably not the right oil.
Ok.. well go get the engine number and Google it.
Thos is car oil. Small engine oil is typically different. You bought a honda engine, put the right oil in it.
and if you're a new homeowner.. my suggestion is to keep those books. you'll refer to them over time
5w-30 will be ok. They may call for 10w-30. But as long as you check the oil level before use will work fine.
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