Your just wasting money if you don't use premiuim
#1
Your just wasting money if you don't use premiuim
The difference between reg gas and prem is around 20 cent. I do 100% city driving and I was getting a little over 18mpg on reg gas. I just moved to a new city and do alot more driving now. I thought using the cheapest gas would save me money but it was actually costing me an extra 5/6 bucks a month. I put in prem last month and filled up today. I got 21.3 MPG would have been higher if I didn't have to use the heat. I think that's pretty wonderful for 100 percent city driving in a place like Denver.
From my calculations in order for it to be worth the extra for prem I would need to get 31 more miles to the tank, with todays fill up I got an extra 55.5 miles to the tank using prem. I had been wasting 5 bucks a month before. Not the mention the restored power. I have a good knock sensor, I replaced it with an ebay one last feb.
From my calculations in order for it to be worth the extra for prem I would need to get 31 more miles to the tank, with todays fill up I got an extra 55.5 miles to the tank using prem. I had been wasting 5 bucks a month before. Not the mention the restored power. I have a good knock sensor, I replaced it with an ebay one last feb.
Last edited by augnon; 10-25-2011 at 08:16 PM.
#3
This is a myth. Sorry. Unless Premium is required (not recommended) you get zero gain. Chances are, you were simply smoother on the gas when accelerating, kept your windows up when driving over 60mph and gas is denser the colder it gets. Makes sense you will get better mileage in the winter months.
#6
This is a myth. Sorry. Unless Premium is required (not recommended) you get zero gain. Chances are, you were simply smoother on the gas when accelerating, kept your windows up when driving over 60mph and gas is denser the colder it gets. Makes sense you will get better mileage in the winter months.
#7
This is a myth. Sorry. Unless Premium is required (not recommended) you get zero gain. Chances are, you were simply smoother on the gas when accelerating, kept your windows up when driving over 60mph and gas is denser the colder it gets. Makes sense you will get better mileage in the winter months.
Also you missed where I said 100 percent city driving.
#8
This is a myth. Sorry. Unless Premium is required (not recommended) you get zero gain. Chances are, you were simply smoother on the gas when accelerating, kept your windows up when driving over 60mph and gas is denser the colder it gets. Makes sense you will get better mileage in the winter months.
#9
This is a myth. Sorry. Unless Premium is required (not recommended) you get zero gain. Chances are, you were simply smoother on the gas when accelerating, kept your windows up when driving over 60mph and gas is denser the colder it gets. Makes sense you will get better mileage in the winter months.
#10
This is a myth. Sorry. Unless Premium is required (not recommended) you get zero gain. Chances are, you were simply smoother on the gas when accelerating, kept your windows up when driving over 60mph and gas is denser the colder it gets. Makes sense you will get better mileage in the winter months.
Of course it does depend on where you get your fuel... the only station I've found near me that sells real 93 octane is Shell... other stations near me sell 89 in place of 93 and still market it as 93, shown by a drop down to 21mpg ... put Shell 93 in again and back to what I now consider normal.
#11
Tell that to my car, which this past summer was getting a pretty steady average of 26mpg on premium (vs 21mpg on other grades, approx half city/half hwy always).
Of course it does depend on where you get your fuel... the only station I've found near me that sells real 93 octane is Shell... other stations near me sell 89 in place of 93 and still market it as 93, shown by a drop down to 21mpg ... put Shell 93 in again and back to what I now consider normal.
Of course it does depend on where you get your fuel... the only station I've found near me that sells real 93 octane is Shell... other stations near me sell 89 in place of 93 and still market it as 93, shown by a drop down to 21mpg ... put Shell 93 in again and back to what I now consider normal.
#12
You keep mentioning "running the heat" like it is detrimental to gas mileage. Why would this be so? I understand why the A/C cuts mileage due to the compressor drag. Heat is just water running through a heater core-- how would that affect mileage?
#13
I'm just assuming that additional use of accessories would use more fuel. My lights dem a bit when I turn the heat on and my idle goes up around 100-200 rpms and then drops when I turn the heat off.
#14
yah heater dont affect gas milege lol, don't know who started that one, alls its doing is blowing air through another like radiator and warming u up. only power it takes is the blower motor. and if that wasted gas then your saying you running head lights at night take more gas then driving during the day.
i dont know but you guys get great MPG i get 16 and 17 on good day with 93 octane and 15 with 87 octane. 235k miles auto with heavy rims.
i dont know but you guys get great MPG i get 16 and 17 on good day with 93 octane and 15 with 87 octane. 235k miles auto with heavy rims.
#15
yah heater dont affect gas milege lol, don't know who started that one, alls its doing is blowing air through another like radiator and warming u up. only power it takes is the blower motor. and if that wasted gas then your saying you running head lights at night take more gas then driving during the day.
i dont know but you guys get great MPG i get 16 and 17 on good day with 93 octane and 15 with 87 octane. 235k miles auto with heavy rims.
i dont know but you guys get great MPG i get 16 and 17 on good day with 93 octane and 15 with 87 octane. 235k miles auto with heavy rims.
My idle still goes up when I turn the heat on so I don't know...
Pic of my car
#17
looks exactly like mine except without a drop and rims. all black 5 percent tint.
#19
I knew I would get some static for what I wrote. It's a fact that unless Premium is required, it will not give you better gas mileage.
I will bet any single one of you that if we take a regular petrol engine out of a car, stick it into a dyno lab under constant pressure, humidity and temperature, and do two runs, one with 87 octane and one with 93, and empty a tank of gas with each, you will see no difference.
Largest decrease in gas mileage is caused by hard starts, on/off constant starts, driving over 60mph with the windows down, constantly using the ac, increasing weight in the car, higher rotational mass at the wheels, and so on...
But, you can listen to the experts if you wish: http://www.consumerenergycenter.org/...s_premium.html
http://www.cartalk.com/content/featu...ium/myths.html
http://www.consumerreports.org/cro/c...view/index.htm
I will bet any single one of you that if we take a regular petrol engine out of a car, stick it into a dyno lab under constant pressure, humidity and temperature, and do two runs, one with 87 octane and one with 93, and empty a tank of gas with each, you will see no difference.
Largest decrease in gas mileage is caused by hard starts, on/off constant starts, driving over 60mph with the windows down, constantly using the ac, increasing weight in the car, higher rotational mass at the wheels, and so on...
But, you can listen to the experts if you wish: http://www.consumerenergycenter.org/...s_premium.html
http://www.cartalk.com/content/featu...ium/myths.html
http://www.consumerreports.org/cro/c...view/index.htm
#20
The difference between reg gas and prem is around 20 cent. I do 100% city driving and I was getting a little over 18mpg on reg gas. I just moved to a new city and do alot more driving now. I thought using the cheapest gas would save me money but it was actually costing me an extra 5/6 bucks a month. I put in prem last month and filled up today. I got 21.3 MPG would have been higher if I didn't have to use the heat. I think that's pretty wonderful for 100 percent city driving in a place like Denver.
From my calculations in order for it to be worth the extra for prem I would need to get 31 more miles to the tank, with todays fill up I got an extra 55.5 miles to the tank using prem. I had been wasting 5 bucks a month before. Not the mention the restored power. I have a good knock sensor, I replaced it with an ebay one last feb.
From my calculations in order for it to be worth the extra for prem I would need to get 31 more miles to the tank, with todays fill up I got an extra 55.5 miles to the tank using prem. I had been wasting 5 bucks a month before. Not the mention the restored power. I have a good knock sensor, I replaced it with an ebay one last feb.
You answered your own question. It's not the gas's reason for your higher mpg rating, but the fact that you drive more or longer per day so your engine has time to warm up. I used to work ~1/2mi from my work and got 16mpg on regular gas but when i started working farther away, ~8mi, my mpg rating went up to 22mpg on regular gas.
If your using premium your wasting your money imo
#21
#22
You are a tard. Read this
http://www.daytona-sensors.com/tech_tuning.html
Straight out of the FSM
This doesn't take into consideration dynamic compression, or the fact that aluminum heads dissipate heat faster and are less prone to detonation.
#1 our cars DO require it (high compression).
#2 High compression + low octane = detonation. Detonation = retarded timing = lower fuel economy.
Do you really think NISSAN would tell us to buy expensive gas if wouldn't benefit us. That wouldn't make sense from a marketing standpoint. Expensive gas or low MPG isn't exactly a selling point.
With that said, I am running the resistor mod and regular fuel with no noticeable detonation, unless I crowd it on a hot day. The fuel itself won't make any difference in MPG, the ECU will.
http://www.daytona-sensors.com/tech_tuning.html
Straight out of the FSM
This doesn't take into consideration dynamic compression, or the fact that aluminum heads dissipate heat faster and are less prone to detonation.
I will bet any single one of you that if we take a regular petrol engine out of a car, stick it into a dyno lab under constant pressure, humidity and temperature, and do two runs, one with 87 octane and one with 93, and empty a tank of gas with each, you will see no difference.
Do you really think NISSAN would tell us to buy expensive gas if wouldn't benefit us. That wouldn't make sense from a marketing standpoint. Expensive gas or low MPG isn't exactly a selling point.
With that said, I am running the resistor mod and regular fuel with no noticeable detonation, unless I crowd it on a hot day. The fuel itself won't make any difference in MPG, the ECU will.
Last edited by asand1; 11-05-2011 at 11:55 AM.
#24
You are a tard.
#1 our cars DO require it (high compression).
#2 High compression + low octane = detonation. Detonation = retarded timing = lower fuel economy.
Do you really think NISSAN would tell us to buy expensive gas if we didn't need to. That wouldn't make sense from a marketing standpoint.
With that said, I am running the resistor mod and regular fuel with no noticeable detonation, unless I crowd it on a hot day. The fuel itself won't make any difference in MPG, the ECU will.
#1 our cars DO require it (high compression).
#2 High compression + low octane = detonation. Detonation = retarded timing = lower fuel economy.
Do you really think NISSAN would tell us to buy expensive gas if we didn't need to. That wouldn't make sense from a marketing standpoint.
With that said, I am running the resistor mod and regular fuel with no noticeable detonation, unless I crowd it on a hot day. The fuel itself won't make any difference in MPG, the ECU will.
All I can suggest to you is to check the manual. (in case you need help, page 10-2) The manual "recommends" 91 octane. It does not mandate 91 octane.
And a Maxima does nt have a high compression engine. I find that actually amusing. And no, our engines will not pre-detonate using 87 octane. And if you think Nissan is 'recommending' anything for your benefit, then you really are ignorant to the ways of the world.
Last edited by Mac.World; 10-25-2011 at 10:09 PM.
#27
#29
LOl, the drop is because the shocks are bad. I had them replaced and the core support done so the car sits higher now. I had 5 percent all around but I was having trouble seeing out the front windows so I had to get 15 in the front. The rims are the stock nissan, I just painted them black some some spray paint.
#30
You answered your own question. It's not the gas's reason for your higher mpg rating, but the fact that you drive more or longer per day so your engine has time to warm up. I used to work ~1/2mi from my work and got 16mpg on regular gas but when i started working farther away, ~8mi, my mpg rating went up to 22mpg on regular gas.
If your using premium your wasting your money imo
If your using premium your wasting your money imo
Here in Denver I drove about 500 a month and have been doing so for 5 months now. I start using the cheap 87 gas because I was driving more and having to buy gas more often. I figured something was wrong with me only getting 18 in the city despite having all my maintenance done.
I filled up with prem last month and got 21 mpg this time. My route/routine here in Denver haven't changed.
#31
I also noticed an increase in performance. As someone stated above the engine was designed to use prem gas althou it can use reg gas as well. My driving habits have not changed but my switch from reg to prem gas yielded a 3 mpg increase from 18 to 21.
#32
4 years of mpg spreadsheets from nearly all fillups. Premium gives me better mpg, and more bang for buck. I dunno why. Basically, it's cheaper to use Premium over regular in my case. But then again, my car was a mutant that ran 15.1 stock at 100k.
Same with my Toyota v6 Camry. Premium makes a huge difference. But not with my Volvo i4. CostCo gas kills my mpg, no matter which grade. Same with Chevron. I avoid those 2 whenever I can.
Dr J
Same with my Toyota v6 Camry. Premium makes a huge difference. But not with my Volvo i4. CostCo gas kills my mpg, no matter which grade. Same with Chevron. I avoid those 2 whenever I can.
Dr J
#35
Octane readings determine the fuel's ability to resist detonation, higher the number, the more resistant, they don't determine the fuels performance qualities. If your engine isn't knocking then you don't need to run higher octane. 10.0:1 is not a high compression engine.
#37
In what? The world of Honda Owners????
I never put anything less than 91 in my 4th gen, and never will.
I have had MULTIPLE trials of 93 vs regular in my stock (pretty much) 5th gen.
Results came out to be what I expected now (but couldn't explain why back then).
Regular vs. Premium on Highway mileage, not a damn difference... The big difference was...
Mixed and city driving.
My route to school every day was a mixed route in and out of traffic of 21.5 miles.
On premium I could easily get 400+ before the light would come on, but on regular I would never see a mile over 350 before the car showed signs of fuel starvation (light came on around 330s)
I also noticed how gutless the car felt below 3k, on premium I could shift before 2.5k and keep up with traffic, on regular I had to go to 3k just so I wouldn't get left behind with traffic.
I took these findings and never went back to regular ever again with a high compression motor with coil packs (a vehicle with the ability to advance or retard timing).
I never put anything less than 91 in my 4th gen, and never will.
I have had MULTIPLE trials of 93 vs regular in my stock (pretty much) 5th gen.
Results came out to be what I expected now (but couldn't explain why back then).
Regular vs. Premium on Highway mileage, not a damn difference... The big difference was...
Mixed and city driving.
My route to school every day was a mixed route in and out of traffic of 21.5 miles.
On premium I could easily get 400+ before the light would come on, but on regular I would never see a mile over 350 before the car showed signs of fuel starvation (light came on around 330s)
I also noticed how gutless the car felt below 3k, on premium I could shift before 2.5k and keep up with traffic, on regular I had to go to 3k just so I wouldn't get left behind with traffic.
I took these findings and never went back to regular ever again with a high compression motor with coil packs (a vehicle with the ability to advance or retard timing).
#38
The inside of a combustion chamber doesn't know, or care, if it's a Honda, or a Nissan. The fact that you notice a difference in mileage in stop start city driving doesn't mean anything exactly because you are stopping, and starting all the time, which uses more fuel, but whether you drive the exact same route every day, you do not drive identically every day. It isn't the fuel, it's the driving. Theoretically lower octane fuel should be MORE economical since it detonates more completely than higher octane which resist detonation better. I used premium when I got my Max because the knock sensor was bad, and I am running the resistor in it's place, but when gas hit 4+ a gallon I switched to 87, and noticed zero difference in performance, and mileage.
Last edited by xj0hnx; 10-26-2011 at 07:32 AM.
#39
Man, this is a touchy subject.. 87 detonates quuicker than 91, and since we have high compression, we need it to detonate a little later to get the correct ignition timing, which means better performance and gas milage. Simple as that.
#40
agreed, I used to run my 4th gen with regular when I first got it, it ran like crap... knock sensor codes.. crappy acceleration.... started filling up with the V-power and everything went back to normal.....