Driver

The g37S 2010 prem/nav runs fine on low octane fuel.

What happens after prolonged utilization of low octane fuel?

Is there an effect on the Catalytic converter? Does anyone actually know

the ramifications of using 87 octane fuel?

Signed,

Driver

HappyG

My advise is don't even think about it.

My wife's Acura RSX don't even require premium fuel, so she used regular fuel. She had to replace the catalytic converter after 40,000 miles on the odometer. My mechanic which is also my friend, told me he believe the catalytic converter went bad because of prolonged use of low octane fuel. He told me to fill up only with premium fuel and the car will be healthier.

My wife didn't think so, so she continue to fill up with regular fuel. Not long after, her car start to shake even at idle. I had my mechanic look at it and he told me no repair was needed, just fill up with premium fuel and the car is cured.

Filled up with premium and the car was smooth again. My wife fill up with premium thereafter.

slimlma04

why would you lose performance, gas mileage for a 20 cent difference per gallon?, you don't win because what you save by putting 87, you lose the same money in mpg. and all in all your hurting your baby. it says premium unleaded only for a reason.

JohnEnglish

Damage to the engine as a result of pre-detonation.

I don't get the whole "I have a $40,000 car but want to save $3 at the gas pump."

Mike

iTrader: (1)

If you can't notice a difference in power from 87 vs 91, you may have bought too much car for yourself.

You WILL lose power. You WILL lose MPG (you end up spending more; that 3% you saved on each gallon just resulted in over a 10% loss in MPG). You WILL lose part of your warranty coverage. The manual and fuel cap specifically state that 91 octane is required for proper operation. Prolonged exposure to low octane fuel is recorded in the ECU, and Infiniti reserves the right to deny coverage.

hispeed-lowdrag

iTrader: (7)

If you're worried about a price difference from 91/93 fuel and 87...get rid of the car and buy a Honda. It is made to use premium fuel, so give it what it was made to use

Chekov

That’s a good point, if you just do the math. For the average driver who drives 15,000 miles per year, and gets around 22 mpg (that’s what I average), that equals 682 gallons per year. At 20 cents more for premium, that works out to an extra $136 each year. I’m sure any G37 owner can afford that when considering he gets better performance, longer engine life, and the satisfaction of not being branded a skinflint.

G37Sam

Compression Ratio of 11.0:1

Enough said

cereal2k

iTrader: (10)

hehehe

Pip

iTrader: (1)

OMG, so I shouldn't be running kerosene in my G?

bukg37

iTrader: (1)

It's a little off the subject, but is there a difference in gas quality from different gas station brands? Like if I buy 93 at Cheveron and 93 at Krogers/Walmart (Grocery store gas stations), is it still the same 93? Should I stay away from certain gas stations or are they all the same? Thanks

surfjax87

The same octane rating means you're getting equivalent gas on the surface, but almost all big name brands have additives and such to keep your engine cleaner as well as emissions. There's a shell less than a mile from my house, so I almost always fill up there.

So using the cheaper gas won't harm your car, but paying the little bit extra helps it run better in the long run.

Black Betty

iTrader: (60)

No. No it doesn't. This subject and the original one (do I really need to use premium gas) has been done to death over and over. Please seek out the upmteen threads on it that already exist here.