COSTCO Engine Oil

Does anyone know who makes the engine oil for COSTCO? Wifey is on my case to start buying oil from COSTCO. (For my T4R, so it would be 0W-20 Synthetic)

I have been a diehard VALVOLINE user for decades, but she is on a penny pinching kick.

I haven’t priced COSTCO oil yet, so I’m not sure just how many pennys we would actually be saving, not to mention the quality of the oil- I don’t want to cause long term harm to my “bullet proof” legendary 4.0L V-6. (2022 model)

I am changing my own oil at home, on a 5,000 miles or 6 month / whichever comes first change interval regimen. I am using oil filters purchased direct / locally from my Toyota dealer.

Is anyone here using COSTCO 0W-20 synthetic in their fifth gen T4R, with any degree of confidence? I also plan on holding on to my ‘22 T4R ‘til death do we part, so I don’t want to regret it down the road if I use COSTCO oil. It’s not used / recycled oil, is it????

Is it safe, or should I run like the wind from it, and stick to my guns and stay with VALVOLINE?

Thanks.

 

Short answer: Your fine. Long answer: Your fine.

Without a deep dive i would venture to guess that the Costco oil meets the exact same specs and tested to the same standard as the Valvoline oil you're currently using. Plus your oil change interval is so frequent (same as mine) you'll be fine.

Save the money, keep the oil change interval and go for Costco oil.

 

Oh sneaky Googs. Giving answers.
Ive used it multiple times and been just fine at next change.

 

It’s good oil. Can’t beat the price either. Use it with confidence

 

I've been a valvoline oil guy also. But I started using super tech from Walmart. I also use toyota filter I buy off Amazon. An oil change costs me around $25.

 

It’s good stuff.

 

I'd run it with confidence, especially with a 5K iinterval.

Ditto the SuperTech stuff from Wallyworld.

 

Warren is where the Costco and many other manufacturer oils come from. Project Farm ran a test on multiple oils and for everyday use, it won’t make much of a difference.

I have been using Kirkland oil for years on all of my cars. The only issue that I have had in the past with Costco, was that it was only available in 5 quart jugs. They solved that and you are now able to buy in 12 quart cases online.

 

Big fan, only deviation I might make from my pile of Kirkland Signature 0W-20 is for a 250k mile Accord (oil leaks, some seals just fixed), but it seems to be happy still.

There’s an in-warehouse High Mileage 5W-30 but I’ll probably continue with 0W-20 unless I notice anything.

Edit: I usually wait for the occasional sale. I believe last time it came down to $30/10 Qt

 

Have you priced the 5 Qt jugs at walmart? Usually very low.
Buy 2 jugs and you can save unused oil for next change when you only need 1 new jug.
I also get my filters from local dealer.

 

It’s good oil.

 

All righty then. Having read everyone’s comments and blessings here, I’ve already gone to our local COSTCO and I bought two cases, at $35.99 / case. “Kirkland Signature Full Synthetic SAE 0W-20 Motor Oil. I’m stocked up for a while now, lol.

Thanks to all who replied putting my mind at ease.

 

Beware of "AI" and similar large-language model/generative answers as the first (and last) stop for truth!

The technology is great at creating correctly-written text in response to a prompt but problems is that randomness is inherent and the training data quality varies. (and that's before touching the human, social, political, financial pressures at play too. https://kaveland.no/posts/2025-06-06-library/)

 

Personally i think its an upgrade vs Valvoline, but 1/2 in one 1/2 in the other. In the end wont make one bit of difference if you do 5k oil changes.

 

Kill yourself over a USB? seems kinda extreme, but hey if the interwebs says to.