Is there a really big difference in premium vs regular gas?
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Originally Posted by Herles(Jersey)
So, yeah...the crooks in the oil industry are banging us up $.21 cents tomorrow. So, this begs the question..can I put regular in without harming the engine? Im sure I may see a bit of a power depletion..but at $4.00 Fing dollars a gallon.. I need to start cutting costs...and 87 or 89 is the way I need to do it.
What do you guys think. Will I hurt anything by downgrading my octane??
What do you guys think. Will I hurt anything by downgrading my octane??
If you have to pinch your pennies that much it might be better to sell it and buy an econo-box.
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How much harm to your engine is speculative. However, there is still harm being done. For instance, a higher performance engine requires the higher octane to properly run. If I remember correctly (this could be reverse) is that a higher octane gas discharges at higher temps. A higher performance engine is tuned to the higher temp discharge. Therefore, with lower octane fuel, the discharge occurs sooner causing misfires and knocking. I'm sure the control units in our cars are smart enough to compensate a little, but long term effects may not be good.
The reason why high octane gas is useless for say a 4 cyl Camry is because the engine never performs to that high level. It'll never hit the high heat situation to get the performance. This means that not all of the fuel is usually discharged. You have those extra octanes just being gassed out of your exhaust. Does it hurt, maybe. But probably not as much as using lower grade fuel for a higher performing car like the G. You're just polluting more I guess.
I also wondered about the entire debate about the same VQ engine being used for other cars like the Altima. They're 87 fuel friendly. And again, this has a lot to do with the tuning of the engine itself. I'm sure the timing and heat thresholds are adjusted accordingly to prevent misfires and knocking. Maybe the ECU could be re-written in the G to compensate for this. But it would be an unfortunate downgrade.
The reason why high octane gas is useless for say a 4 cyl Camry is because the engine never performs to that high level. It'll never hit the high heat situation to get the performance. This means that not all of the fuel is usually discharged. You have those extra octanes just being gassed out of your exhaust. Does it hurt, maybe. But probably not as much as using lower grade fuel for a higher performing car like the G. You're just polluting more I guess.
I also wondered about the entire debate about the same VQ engine being used for other cars like the Altima. They're 87 fuel friendly. And again, this has a lot to do with the tuning of the engine itself. I'm sure the timing and heat thresholds are adjusted accordingly to prevent misfires and knocking. Maybe the ECU could be re-written in the G to compensate for this. But it would be an unfortunate downgrade.
#160
It was just a question out of curiosity. The difference in my fill up is going to be around 15 bucks from regular to super here in NJ..Filling up 3 times a week, its 45 bucks a week, or $180 a month....It adds up, which is why Im curious.
Originally Posted by GEE35X
You can run regular in it and the cars computer will adjust the timing to suit. But really there isn't a big cost difference in regular to Premium for each fill-up, why not use what is reccommended.
If you have to pinch your pennies that much it might be better to sell it and buy an econo-box.
If you have to pinch your pennies that much it might be better to sell it and buy an econo-box.
#161
Yeah, I hear ya..not worth it in the long run I guess...Ill stick with the 92-93 I get out here.
Thanks for the FYI
Thanks for the FYI
Originally Posted by overdrve
How much harm to your engine is speculative. However, there is still harm being done. For instance, a higher performance engine requires the higher octane to properly run. If I remember correctly (this could be reverse) is that a higher octane gas discharges at higher temps. A higher performance engine is tuned to the higher temp discharge. Therefore, with lower octane fuel, the discharge occurs sooner causing misfires and knocking. I'm sure the control units in our cars are smart enough to compensate a little, but long term effects may not be good.
The reason why high octane gas is useless for say a 4 cyl Camry is because the engine never performs to that high level. It'll never hit the high heat situation to get the performance. This means that not all of the fuel is usually discharged. You have those extra octanes just being gassed out of your exhaust. Does it hurt, maybe. But probably not as much as using lower grade fuel for a higher performing car like the G. You're just polluting more I guess.
I also wondered about the entire debate about the same VQ engine being used for other cars like the Altima. They're 87 fuel friendly. And again, this has a lot to do with the tuning of the engine itself. I'm sure the timing and heat thresholds are adjusted accordingly to prevent misfires and knocking. Maybe the ECU could be re-written in the G to compensate for this. But it would be an unfortunate downgrade.
The reason why high octane gas is useless for say a 4 cyl Camry is because the engine never performs to that high level. It'll never hit the high heat situation to get the performance. This means that not all of the fuel is usually discharged. You have those extra octanes just being gassed out of your exhaust. Does it hurt, maybe. But probably not as much as using lower grade fuel for a higher performing car like the G. You're just polluting more I guess.
I also wondered about the entire debate about the same VQ engine being used for other cars like the Altima. They're 87 fuel friendly. And again, this has a lot to do with the tuning of the engine itself. I'm sure the timing and heat thresholds are adjusted accordingly to prevent misfires and knocking. Maybe the ECU could be re-written in the G to compensate for this. But it would be an unfortunate downgrade.
#162
Originally Posted by Herles(Jersey)
It was just a question out of curiosity. The difference in my fill up is going to be around 15 bucks from regular to super here in NJ..Filling up 3 times a week, its 45 bucks a week, or $180 a month....It adds up, which is why Im curious.
You must rack up the miles to have to fill up your tank 3 times a week
![EEK!](https://g35driver.com/forums/images/smilies/eek.gif)
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