![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 Signature 0W20, 5W20, 5W30 Full Synthetic Motor Oil, 2-pack $10 off - RedFlagDeals.com Forums Costco] Kirkland Signature 0W20, 5W20, 5W30 Full Synthetic Motor Oil, 2-pack $10 off - RedFlagDeals.com Forums](https://b.dam-img.rfdcontent.com/cms/009/868/021/9868021_original.jpg)
Costco] Kirkland Signature 0W20, 5W20, 5W30 Full Synthetic Motor Oil, 2-pack $10 off - RedFlagDeals.com Forums
![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/hqdefault.jpg)
Is Costco's Kirkland Motor Oil Safe for Your Car? Let's find out! SuperTech Synthetic vs Kirkland - YouTube
![Costco] Kirkland Engine Oil 2-Pack 0w20/5w20/5w30 - $31 (in-store) / $45 (online). - Page 12 - RedFlagDeals.com Forums Costco] Kirkland Engine Oil 2-Pack 0w20/5w20/5w30 - $31 (in-store) / $45 (online). - Page 12 - RedFlagDeals.com Forums](https://e.dam-img.rfdcontent.com/cms/007/162/954/7162954_original.jpg)