Is it bad to fill up a gas of tank when the tank still has half a tank left??

[atn_chargers]

I'm about to go on a roadtrip with my g35. Right now its sitting at half tank (chevron). The gas station near my house is a shell. So does it matter if I fill the rest of the tank up with Shell?? Different gas stations have different amount of detergnets right?

[oldandslow]

No,it does not matter!And Chevron and Shell are both great quality fuels.

[atn_chargers]

Ok thanks. I know both are 91 octane in my area. But wasn't too sure about the detergent factor.

[370Z/28]

Wow...I use nothing but 93. I didn't know that 91 was an option.

[SVTCOBRA]

No,it does not matter!

[atn_chargers]

I live in Albuquerque and we are as high up in elevation as Denver. I think the reason why we only have 91 octane is because our air is really thin...so anything over 91 might have a hard time burning.

[Kendahl]

The only important parameter for gasoline is the octane rating. Buy what your car requires. Some G models require 91 octane and shouldn't be given less. Others require only 87 octane although, for best performance, 91 octane is recommended. (Telcoman runs his G35 on 87 octane and wouldn't get any benefit from from 91 octane.)

I don't worry about the brand. For several years I regularly bought gas at a neighborhood bar with a couple of pumps out front because they had the lowest prices in town. I have no idea where the gas came from. My cars ran fine on it.

I also will use E-10 when the price is right. Since the energy content of E-10 is 3% less than straight gas, you should expect 3% lower gas mileage with it. Therefore, I will only buy E-10 if it is more than 3% cheaper than straight gas. (Some people have experienced substantially lower gas mileage on E-10. For them, the price difference would have to be proportionately greater for E-10 to make sense. And, if the car runs badly, it's not a bargain at any price.)

[C-Kwik]

I live in Albuquerque and we are as high up in elevation as Denver. I think the reason why we only have 91 octane is because our air is really thin...so anything over 91 might have a hard time burning.

Octane has nothing to do with the ability for gas to burn. When fuel is atomized and mixed with oxygen, it only needs a heat source to ignite it.

The reason we see lower octane at higher elevations is simple. As air is less dense there, the absolute peak pressure reached at TDC will be lower than what would be reached at sea level. As a result, engines have less propensity to knock at higher elevations so you simply do not need as high of an octane rating.

[SVTCOBRA]

OK, since we are talking Octane and G's....

WHO CAN TELL ME WHY A COUPE ENGINE REQUIRES PREM AND A SEDAN ENGINE DOES NOT BASED ON THE MANUALS........ISN"T IT THE SAME FREAKING ENGINE???

I've asked this before and never got an answer.

If I do not get an answer I WILL CONTINUE TO ONLY TYPE WITH CAPS ON!!!!!!!

[Kenrik]

OK, since we are talking Octane and G's....

WHO CAN TELL ME WHY A COUPE ENGINE REQUIRES PREM AND A SEDAN ENGINE DOES NOT BASED ON THE MANUALS........ISN"T IT THE SAME FREAKING ENGINE???

I've asked this before and never got an answer.

If I do not get an answer I WILL CONTINUE TO ONLY TYPE WITH CAPS ON!!!!!!!

Different ECU.. the Coupe is tuned for Premium.

[pfarmer]

I'm about to go on a roadtrip with my g35. Right now its sitting at half tank (chevron). The gas station near my house is a shell. So does it matter if I fill the rest of the tank up with Shell?? Different gas stations have different amount of detergnets right?

Depending on where the stations picked up their fuel it may actually have come out of the same storage tank. I would not worry about mixing the fuels from different stations, especially since you are mixing half and half of the same octane.

Perry

[Poyzinous]

OK, since we are talking Octane and G's....

WHO CAN TELL ME WHY A COUPE ENGINE REQUIRES PREM AND A SEDAN ENGINE DOES NOT BASED ON THE MANUALS........ISN"T IT THE SAME FREAKING ENGINE???

I've asked this before and never got an answer.

If I do not get an answer I WILL CONTINUE TO ONLY TYPE WITH CAPS ON!!!!!!!

Gosh darnedit Rich.... Its because you never asked ME.The simple reason is the ECM tuning. The parameters in the coupe ECM are set higher than the sedan, with 20 less hp, and even in the series 2, when they both have 280 in auto form, the coupe has a bit more midrange power because of its different ECM tuning.

[370Z/28]

Am I the only person here that finds it extremely funny that a bar has gas pumps???

[atn_chargers]

Yeah thats pretty weird. I don't think I can ever buy gas from a bar. No matter how safe it is.

[370Z/28]

Instead of 91 octane, it is 91 proof!



You and your car can both get gassed.

[atn_chargers]

G35: "What you're cheating on me?!?!?!"

Me: " No, no... I just said that's a nice charger..that's all"

G35: "How could you??"

**DEPLOYS AIRBAG IN MY FACE**

That's what 91 Proof would do to my car.

[370Z/28]

Mine would probably be more like me. Everytime a different song came on the radio it would stick it's two front tires up in the air and scream "Whoooooo that is my favorite song"

[telcoman]

(Telcoman runs his G35 on 87 octane and wouldn't get any benefit from from 91 octane.)

I don't worry about the brand. For several years I regularly bought gas at a neighborhood bar with a couple of pumps out front because they had the lowest prices in town. I have no idea where the gas came from. My cars ran fine on it.

Not only did I not see any benefit using 91 octane, I didn't see any benefit from the month I used Sunoco 93.





I'm back to WaWa 87 octane and my G and my wallet loves it

So Infiniti recommends premium

Spend $50 in Best Buy and they recommend a service contract

Telcoman

Modified by telcoman at 4:31 PM 8/18/2009
Modified by telcoman at 4:42 PM 8/18/2009

[marlin29311]

Not only did I not see any benefit using 91 octane, I didn't see any benefit from the month I used Sunoco 93.

I'm back to WaWa 87 octane and my G and my wallet loves it

So Infiniti recommends premium

Spend $50 in Best Buy and they recommend a service contract

Telcoman

Actually the compression ratio in your engine is asking for it. Not the same thing as the 16 year old in BB trying to sell you a service contract.

And I'm sure the extra $2 is keeping your cupholder filled with cheap coffee

[telcoman]

Actually the compression ratio in your engine is asking for it. Not the same thing as the 16 year old in BB trying to sell you a service contract.

And I'm sure the extra $2 is keeping your cupholder filled with cheap coffee

Well the saving does pay for my morning Dunkin Donuts coffee.I can't afford Starbucks nor would I pay their prices as a matter of principle.

Telcoman

[370Z/28]

Aw come on man....my daughter works at Starbucks. It's worth the money.

[telcoman]

Aw come on man....my daughter works at Starbucks. It's worth the money.

They are not open anyway when I leave for work. Dunkin Donuts is 24/7

[370Z/28]

Ok...I'll let'cha slide.

[marlin29311]

They are not open anyway when I leave for work. Dunkin Donuts is 24/7

I must say that I've heard DD has the best coffee...I'm not a drinker myself, but I know my mom pretty much has it on IV right now...