- Jul 19, 2022
- Reaction score
The 2022 and newer Yukon Denali, recommends 91 octane. Has anyone tested lower octane, and how that may or may not have affected the way the vehicle performs? Just wondering if you use 88 or 87, how will that affect the engine? Some folks have different ideas on this...I wanted to see what your thoughts were on this type of performance question...thanks for anyone that helps in your response.