So this morning I went to put gas in the car. It was almost empty. After nine gallons of gas in the car, I realized I was putting the crappy kind . But then started fueling with the good kind. Why is it bad to fuel the car with anything less than 91? It clearly says to fill up with 91 but I screwed up with the fuel today.

 

its not gona make a difference if you messed up once ad not even the whole tank. i doubt it will create knocking, ****, i know people who put regular everyday and it doesnt knock. no worries my friend. your G is good

 

ya i would not sweat it one bit ... just a great reason to drive off the tank and refill ... thats what i would do ...

 

1. As others have said, not a big deal
2. But, you may have lower performance because
3. The reason the G requires premium is because it's a relatively high-compression motor. Lower octanes can cause the engine to detonate (you of all people don't want me to explain, just trust me), and the engine will respond by pulling timing
4. This will reduce the horsepower and torque of the engine
5. Once you fill back up with premium, it'll go back to normal
6. You may not even notice

 

a stupid question:
will the midgrade be ok?

 

See the post above yours.

Midgrade all the time would be the things in that post all the time, just not quite as bad as low grade.

 

Premium costs about 20 cents more in my area than midgrade. I fill up about 16-17 gallons each week. Thus, it costs me an extra $3.50 or so more for 91 octane. At 52 weeks/yr, it comes out to about $182/yr.

$182 a year is a tiny price to pay for having my car perform at its peak.

Even if one drives 30,000 miles a year, the difference btw premium vs. midgrade octane is only about $350/yr.

What would be the point of buying a high performance sport sedan and purposely reducing its performance by buying cheap gas when the price difference is negligible?

 

You should realized no ill effects . . . Don't worry about it. The car was simply designed to operate with 91 octane.

 

My concern is IF the gas will go up in price to 4-4.50$....

 

Car requirements have three ratings:

Regular
Premium recommended
Premium required

We fall into the middle category where it's recommended, but you can run anything you need to. That why most dealerships run regular.

 

The loaners you get from dealers are running with the 87 octane gas.

 

we run 91 >.<

87 = less power and less MPG.

those of you complaining of bad MPG... using 87 are we?

 

i luv my g too much and will only give it the good stuff

 

Hahaha... I've never used 87 my entire life... even on my old Accord coupe.

I still get 13~15 mpg and I blame my heavy foot.

And Cerrtos Infiniti and Costa Mesa Infiniti service techs told me they used 87s on their loaners.

 

What the heck is knocking?