Is there a really big difference in premium vs regular gas?
#167
04-24-2008, 05:32 PM
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.
They make a nice sport Suzuki for you cheap guys , I think you can get it equipped with a sunroof, 17in wheels and a 5 speed for like 14K... LOL
#168
04-24-2008, 05:34 PM
Originally Posted by CrazyRuskie
I don't know how you're paying $15 more per fill up?
Irregardless that is a lot of driving. Must be travelling daily with his job. In that case it could be wrote off on expenses
.
#169
04-24-2008, 05:36 PM
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#170
04-24-2008, 05:40 PM
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.
We either pay, or park, but I for one, will not run anything under 91 octane in my G and I'm not parking it!
#172
04-24-2008, 06:11 PM
#173
04-24-2008, 07:27 PM
#174
04-24-2008, 08:50 PM
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#176
04-25-2008, 12:40 AM
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#177
04-25-2008, 09:18 AM
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Yeah, you're right..my "savings" was a bit aggressive. So, here's the breakdown...In Jersey anyway..as of last night at Exxon:
87: $3.39
89: $3.59
92: $3.79
So, $ .40 Cent Difference.
20 gallons a fill correct? so thats 8 bucks.
Not worth it for me X 3 X's a week = $24 bucks a week, or $96 a month or $1152 a year. Starting to add up right?
But "F" it not really wanting to cause detonation and retard the timing and F up my air to fuel ratio's etc. AND worst of all..loose HP.. Hells bells
And yeah..I drive my DiC$ off..Im a sales director and have to meet my reps out etc.
87: $3.39
89: $3.59
92: $3.79
So, $ .40 Cent Difference.
20 gallons a fill correct? so thats 8 bucks.
Not worth it for me X 3 X's a week = $24 bucks a week, or $96 a month or $1152 a year. Starting to add up right?
But "F" it not really wanting to cause detonation and retard the timing and F up my air to fuel ratio's etc. AND worst of all..loose HP.. Hells bells
And yeah..I drive my DiC$ off..Im a sales director and have to meet my reps out etc.
Originally Posted by GEE35X
That is why I asked him to post the figures. I don't know how he got that much.
Irregardless that is a lot of driving. Must be travelling daily with his job. In that case it could be wrote off on expenses .
Irregardless that is a lot of driving. Must be travelling daily with his job. In that case it could be wrote off on expenses
.
#178
04-25-2008, 09:31 AM
Originally Posted by elayman
i thought they require premium (aka 91 octane) rather than 92+, these aren't even sold where I live, and if your premium is 93 then your cheapo gas should be 91 correct? so I think it depends on where you live, whether it requires premium or regular.
I have used 93 since I bought the G35 but in my old Solara I did a few comparisons. Generally the MPG difference between premium & regular was enough to cover the difference is price.
#179
04-25-2008, 06:49 PM
Originally Posted by redlude97
Before we even address the issue of how regular gas effects the performance of the engine, have you actually done the math to see how much money you would save in a year by switching?
OK...where I live for regular unleaded it is $3.55 per gal, and premium is $3.75. When I fill up with 15 gallons it will run me $56.25 for premium and $53.25 for regular. That's only a difference of $3.00. I fill up about 3 times a month...that's a savings of $9.00...multiply that by 12 months and that saves me $108 per year.
Hmm,
-saving $3.00 at each fill-up
-savings of $9.00 per month
-savings of $108.00 per year
-driving an awesome car with the right ingredients...PRICELESS!
Premium gas FTW!!! You're G35 will thank you for it
#180
04-25-2008, 07:12 PM
Originally Posted by ovrkast
OK...where I live for regular unleaded it is $3.55 per gal, and premium is $3.75. When I fill up with 15 gallons it will run me $56.25 for premium and $53.25 for regular. That's only a difference of $3.00. I fill up about 3 times a month...that's a savings of $9.00...multiply that by 12 months and that saves me $108 per year.
Hmm,
-saving $3.00 at each fill-up
-savings of $9.00 per month
-savings of $108.00 per year
-driving an awesome car with the right ingredients...PRICELESS!
Premium gas FTW!!! You're G35 will thank you for it
Hmm,
-saving $3.00 at each fill-up
-savings of $9.00 per month
-savings of $108.00 per year
-driving an awesome car with the right ingredients...PRICELESS!
Premium gas FTW!!! You're G35 will thank you for it