![Test Results – Kirkland Signature Full Synthetic, and RacePro Synthetic Blend | The Petroleum Quality Institute of America Test Results – Kirkland Signature Full Synthetic, and RacePro Synthetic Blend | The Petroleum Quality Institute of America](https://i0.wp.com/pqia.org/wp-content/uploads/2021/03/kirkland-and-racepro-2172021.jpg?fit=598%2C390&ssl=1)
Test Results – Kirkland Signature Full Synthetic, and RacePro Synthetic Blend | The Petroleum Quality Institute of America
![Kirkland Motor Oil, what do you guys think? Pretty good deal but not sure how it'll compare to other brands. Love Kirkland quality on other things though. : r/Costco Kirkland Motor Oil, what do you guys think? Pretty good deal but not sure how it'll compare to other brands. Love Kirkland quality on other things though. : r/Costco](https://preview.redd.it/uw5ktoxy1s141.jpg?width=640&crop=smart&auto=webp&s=bf63e0ed8a90c22cf59108cd5508c110f4313a11)
Kirkland Motor Oil, what do you guys think? Pretty good deal but not sure how it'll compare to other brands. Love Kirkland quality on other things though. : r/Costco
![Anybody running the Kirkland Signature Full Synthetic 5W-30 Engine Oil? Thinking about using this in my 2011 STI. Hard to beat the price and it's got all the API and dexOS certifications. Anybody running the Kirkland Signature Full Synthetic 5W-30 Engine Oil? Thinking about using this in my 2011 STI. Hard to beat the price and it's got all the API and dexOS certifications.](https://i.redd.it/2yypd88wnug81.jpg)
Anybody running the Kirkland Signature Full Synthetic 5W-30 Engine Oil? Thinking about using this in my 2011 STI. Hard to beat the price and it's got all the API and dexOS certifications.
Costco / Kirkland full synthetic oil is not certified for use in any Ford | MaverickTruckClub - 2022+ Ford Maverick Pickup Forum, News, Owners, Discussions
![Is Costco's Kirkland Motor Oil Safe for Your Car? Let's find out! SuperTech Synthetic vs Kirkland - YouTube Is Costco's Kirkland Motor Oil Safe for Your Car? Let's find out! SuperTech Synthetic vs Kirkland - YouTube](https://i.ytimg.com/vi/l9il_piyuT8/sddefault.jpg)
Is Costco's Kirkland Motor Oil Safe for Your Car? Let's find out! SuperTech Synthetic vs Kirkland - YouTube
Costco / Kirkland full synthetic oil is not certified for use in any Ford | Page 5 | MaverickTruckClub - 2022+ Ford Maverick Pickup Forum, News, Owners, Discussions
![Is Costco's Kirkland Motor Oil Safe for Your Car? Let's find out! SuperTech Synthetic vs Kirkland - YouTube Is Costco's Kirkland Motor Oil Safe for Your Car? Let's find out! SuperTech Synthetic vs Kirkland - YouTube](https://i.ytimg.com/vi/l9il_piyuT8/mqdefault.jpg)