87

I came from a car that only wanted owners to use 91 octane. I noticed the Genesis states that you can use 87 but 91 is recommended? What are you using? For those that are using 87, have you experienced any negative outcome such as knocking?

Per title anyone experience this? We bought my folks a 2013 Genesis V6 Sedan and it's getting a little knock off the line. Just wanted to get every ones feedback on this... Thanks

ok, w/ gas prices soaring (4.29 for regular where i live and 4.50 for premium) at the pump and no end to these high prices in the near future, what are you guys using? i have always used premium (91 octane) but now i'm considering 87. just wondering if you will feel a difference in the...