t-bone1924

I was wondering whether the use of regular gas in the new G37 would be detrimental to the engine. I know that all of the literature that I have seen say "premium fuel required".

Other cars I have driven say premium fuel recommended, but the only thing that happens is a little less power and worse mileage.

Anyone know for sure? I don't need opinions, just the facts, if you really know them!

finagle69

iTrader: (3)

detrimental, no.

loss in performance and mileage, yes.

Garnet Canuck

For all such little cost savings you'd actually see in the run of a year, I definitely stick with 91 or 93 octane.

RoCkY86

If they say use Premium use Premuim.

Callaway

If you are thinking about this at all, stay away from the G37.

vbx

If you are not welling to spend 10 more cents for 91 octane, you shouldn't be driving a G37. That's what? A whole 2-3 more dollars to fill with 91.

So by switching to 87 octane, you save 2-3 dollars per fill. In return, you get a knocking/pinging engine. It's your car, just don't biotch about it later down the line.

ex: "Infiniti SUCKS!!! Car is pinging and knocking after 2 months". LEMON!!! LEMON!!! LEMON!!!

carlo_amacio

what he said

RoCkY86

wow your still here.

Juan-g35

yeah i'm a "by the book" guy. that **** says premium, then thats what the g gets. i doubt nissan made that sign just to melt our pockets.

SeismicGuy

This subject always cracks me up, especially when it comes from someone who has opted to obtain a performance car. Just do the math and see if your concerns are warranted. Assuming 30 cents more a gallon for premium (probably not really that much) and assuming you drive 10,000 miles a year and get 20 mpg, that comes to 500 gallons of gas. So 500 gallons at 30 cents more per gallon comes to $150. Do you really want to downgrade the potential performance of you car so that you can save $150 per year?

Doug

Juan-g35

thank you.

XenChi

Without question, you will see a loss in the performance of the vehicle. As stated, "knocking and pinging" will more than likely occur as well. The G37 is a performance oriented vehicle and therefore requires performance oriented octane levels. Performance and cheap will never go "hand in hand", be it maintenance, tires, brake pads, rotors........or fuel. This is why you are receiving the "If you're asking this question, don't even buy the car response". Ownership of this vehicle will cost you. If you are looking for a way to circumvent paying the extra $2.00-$3.00 for the proper fuel your car requires, the future costs to come will more than likely leave you displeased.
Whatever your decision........best of luck.

dkhuynh

like stated above... if your car REQUIRES 91 octane.. give it that AKI or you'll get ping and knocking... if it RECOMMENDS 91 but REQUIRES 87.. give it regular. If getting regular gas is your goal, then purchase a civic or corolla. If you wanna hang with the big boys, it's gonna cost you.

mundellsa

I've run 89 octane mid-grade fuel (10% ethanol) in my 04 G35 since the day it was new and never had a problem. Have 45k problem free miles. I ran the tank as close to dry as I dared to compare a full tank of premium and could not tell a difference.

However, I generally agree with what others are saying, if the small price difference over a year is a concern then this car isn't for you. Tires for one thing would be likely to give you heart failure if you're worried about the fuel costs.

t-bone1924

Thanks for the responses. If the G requires it, premium it will get!

Saving money was not the main issue for my question--wasting money was. I have owned several other high performance cars, all of which were far more expensive than the G37, which called for premium fuel. In all cases, regular did the job just fine albeit a little less mileage per tank, mainly because the computer adjusted for the lower octane.