Acceleration issues PLEASE HELP!
So, i've been having issues with my acceleration for the last 8 months. It accelerates fine from a stop;However, When im driving occasionally when i try to speed up it laggs and then suddenly jumps forward. It's intermittent and thrown no codes. And it doesn't feel like a misfire. I've been trying to self diagnose it since it first started, but cant figure it out so i finely took it to a mechanic to diagnose it. 
The mechanic told me he could find nothing wrong with it and to use 93 octane gas because my engine isn't supposed to use ethonal?? I drive a 2004 nissan xterra 3.3L. Is it true that my car cant handle ethonal? or what could be the issue? Thank you
The mechanic told me he could find nothing wrong with it and to use 93 octane gas because my engine isn't supposed to use ethonal?? I drive a 2004 nissan xterra 3.3L. Is it true that my car cant handle ethonal? or what could be the issue? Thank you
