Hello everybody,

Should I use premium gas for my G35x? Would regular gas be OK to use as well?
The car has 40k.

 

Yes, use super only. i personally wouldn't use regular.

 

go by what the manual suggests. Most use premium while other that don't see the point of spending extra use regular. I prefer to follow to manual and only put in premium. Others have used regular without any problem, i'm sure you can search and find many threads on this.

 

The manual reccomends Premium or 91 octane, that is what most people use.
In a pinch you can put regular in but you will lose a bit of performance.

 

premium dude, she needs premium!

 

i only buy premium

 

spend the extra 3 bucks a tank.

 

If you read your owner's manual, it says "Infiniti recommends the use of unleaded premium gasoline with an octane rating of at least 91 AKI (Anti-Knock Index) number. If unleaded premium gasoline is not available, you may use unleaded regular gasoline with an octane rating of at least 87 AKI number (Research octane number 91), but you may notice a decrease in performance."

The G's fuel management system makes adjustments for the type of gas you put in your car. The ingition timing, valve timing, spark energy, and of course fuel curve are all adjusted. The car has the ability to run on 87 octane without knocking or detonating because, for lack of a better term, it "de-tunes" the engine. Obviously, using 87 octane over premium will reduce performance, but it will not harm anything. It's just a matter of preference. I choose to use a midgrade 89 octane.

 

use premium gas...

 

i use regular on road trips (except mountain passes, cause i need the bang) but otherwise i use premium, there is a noticeable change in octanes and performance in the VQ's

 

i have a 06 sedan and I notice a decrease in performance when even using 89. Doesn't seem to want to rev as high and as fast when not using premion. I think shell v-power is one of the best brands.

 

PREMIUM!!!

I use Sunoco Ultra 94 octane.BIG,BIG differance in performance and milage from 89.I easily get 26 MPG.I don't drive it like a hearse either!

 

premium only

 

I can't tell the difference in performance when I use regular.

 

Rtfm.