unleaded

I have a 2009 3.8 Genesis sedan black 91k. I have been using supreme unleaded if I am saying it right for a year. I have read many comments and trying to inquire from dealers. Is regular unleaded purfered for the 3.8? My gas mileage is not great with supreme nor does it accelerate smoothly like...

I concluded phase one of my test. I strictly use Mobil gasoline for this test and thought I would share my findings. Car: 5.0 Ultimate RWD Conditions: Sport mode 24/7 in strictly city driving of one full tank of each fuel type (Super Unleaded and Regular Unleaded). Findings: Burned 1 full...

I wanted to see if anyone has noticed a big difference in the fuel economy of your 2015 Genesis. I know the 5.0 can use regular or premium gas (I don't know about the V6), and there is a small sacrifice in HP and torque using regular. But just looking at the fuel economy, has anyone tried to...

Great article: http://blog.caranddriver.com/pb-and-jail-new-research-ties-leaded-gas-ban-to-drop-in-violent-crime/

I've noticed for some time that when I accelerate up a hill, I would hear a noise in the engine area which sounds like engine knock. I've always used regular fuel. So last time, I switched to higher octane, and went up the same hill under hard acceleration. No more knocking. Has anyone else...