I did a little research and the Kirkland oil is manufactured by Warren Distribution. It seems that the full synthetic has also been proven to be very comparable to Mobile One.
2 months ago
| 1
I did a little research and the Kirkland oil is manufactured by Warren Distribution. It seems that the full synthetic has also been proven to be very comparable to Mobile One.
2 months ago
| 1
Works IRL
If you're a member of Costco, their Kirkland Signature Synthetic Motor Oil is currently on-sale (Aug. 25 to Sept. 21, 2025). I've never used their branded motor oil and speculate it's likely a private-labeled, commonly-known high-quality brand. Depending on what my local Costco has in-stock, I may try their 5W-30 and/or 0W-20 weight oil. Let us know in the comments if you've had any experience with their motor oil. cc:@DiligentDave1966@CostcoTV
2 months ago (edited) | [YT] | 1