Ok.. So what is the concensus on whether to purchase high octane gasoline or not?

Stock '05 60k miles.. Pristine coupe...
But I like to get on it when I take it for spin.....

Thanks

 

These car require premium fuel, if you put in anything less its going to wear the engine

 

I copied and pasted the following information from the web. Our cars are designed to be operated with premium gas, the Service Manual cautions against the use of lower octane gasoline's.

Many high-performance engines like the ones in the Infiniti G35 are designed to operate with a high maximum compression, and thus demand fuels of higher octane. The power output of an engine depends in part on the energy density of the fuel being burnt.

However, burning fuel with a lower octane rating than that for which the engine is designed often results in a reduction of power output and efficiency. Many modern engines are equipped with a knock sensor (a small piezoelectric microphone), which sends a signal to the engine control unit, which in turn retards the ignition timing when detonation is detected. Retarding the ignition timing reduces the tendency of the fuel-air mixture to detonate, but also reduces power output and fuel efficiency. Because of this, under conditions of high load and high temperature, a given engine may have a more consistent power output with a higher octane fuel, as such fuels are less prone to detonation.

Octane rating or octane number is a standard measure of the performance of an engine. The higher the octane number, the more compression the fuel can withstand before detonating (igniting). In broad terms, fuels with a higher octane rating are used in high performance gasoline engines that require higher compression ratios. Gasoline engines rely on ignition of air and fuel compressed together as a mixture without ignition, which is then ignited at the end of the compression stroke using spark plugs. Therefore, high compressibility of the fuel matters mainly for gasoline engines. Use of gasoline with lower octane numbers may lead to the problem of engine knocking.[1]

 

In short
Use premium/super gas

/thread

 

If you can't afford the premium you should have bought the car
Just my 2cents

 

Edited

 

Yes, buy premium. Its $3 extra a week. If that's the difference between you eating and starving, maybe we find you a nice bicycle.

 

I remember Bluedevils95 told me that he was sitting at the dealers long time ago and said that one lady just put 87 in all the time and had to change a lot of part on the FX. These cars require 91plus. octane. Why buy these cars if you can't afford it? Should have bought a Honda or corolla for your DD

 

Use what the manufacturer recommends, which is Premium.

Anything else and you may have issues. There are a few threads on here about the subject if you search.

 

LOL! Glad someone quoted my speech. Why buy these cars if you can afford a coupe extra bucks or maintenance?

 

Nissan recommends premium fuel, that's what is printed on your gas door...why doubt the manufacture? We have members here that use regular but honestly I'd hate to see the shape their cars are in! Car wash is when it rains.
Gary