prem Gas?
#2
03-07-2006, 01:33 AM
#4
03-07-2006, 02:30 AM
Really? I think thats the first time I've heard a G35 owner put reg. gas and for over a year! Good luck with the car 
ever since then my baby only gets premium 
#7
03-07-2006, 04:57 AM
hmmmm
i think the whole premium gas crap is bull... i mean.. i dont know this for sure... but i would assume that difference countrys have different standards for premium gas... i only put in premium and thats for performance reasons... which leads me to beleive that since they test the cars and dyno them with premium... and promote/advertise those numbers... that they have to say to use premium otherwise it would be false advertising...
this is completely out of my a$$ but it makes sense to me..
my two cents.....
either way... id bet a lot of money that using 87 instead of 91.. will be just fine....just a lack in performance....
f
this is completely out of my a$$ but it makes sense to me..
my two cents.....
either way... id bet a lot of money that using 87 instead of 91.. will be just fine....just a lack in performance....
f
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#9
03-07-2006, 07:00 AM
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The G's engine is equipped with a knock sensor that the ECU uses to monitor knock and adjust ignition timing in real time. Theoretically, it's okay to use regular gas because the computer will compensate by retarding the spark enough to reduce the knock down to harmless levels. However, performance definitely suffers. Personally, I would NEVER try to save 20 or 30 cents a gallon by using regular rather than premium fuel. If your budget is stretched so tightly that you're looking to save what is at most a couple dollars a day, perhaps you should be driving a different, more affordable car. 
#10
03-07-2006, 07:18 AM
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Originally Posted by runningonmt
The G's engine is equipped with a knock sensor that the ECU uses to monitor knock and adjust ignition timing in real time. Theoretically, it's okay to use regular gas because the computer will compensate by retarding the spark enough to reduce the knock down to harmless levels. However, performance definitely suffers. Personally, I would NEVER try to save 20 or 30 cents a gallon by using regular rather than premium fuel. If your budget is stretched so tightly that you're looking to save what is at most a couple dollars a day, perhaps you should be driving a different, more affordable car.
#11
03-07-2006, 08:49 AM
why would u spend all this money on a luxury sports coupe that requires premium gas and then cheap out on the regular gas?? boggles my mind. if u can't afford the gas maybe u shouldn't have bought the car... u may have some financial issues to think about. just a thought. 
here's a quick article i found online:
here's a quick article i found online:
High Octane Gas Myth
I know a lot of people who believe that higher octane gas is “better” for your car than lower octane gas, as if the words premium next to the higher ratings actually mean the gasoline is better for your car. It isn’t. If you believe it is, don’t be dismayed, you’ve simply become accustomed to reading the words “premium” next to the label and believing the great marketing machine that helped create over $10B in 4th quarter profits for companies like Exxon-Mobil. The octane rating of gasoline is a measure of how much you can compress the gasoline before it ignites, not how “good” it is.
Cars that require higher octane gas actually need that higher priced gas because the engines compress the fuel more before it ignites it. If you put regular gas in a car that requires premium, the gas will prematurely ignite when it’s being compressed and the engine will give you a knocking sound. This is bad for your car.
Chemists perk up…
For all you burgeoning chemists, gasoline is basically octane and heptane, or hydrocarbon chains that are 8 (octane) or 7 (heptane) carbons long. Octane simply can be compressed better (i.e. without the exploding part, at least at the same levels of pressure) than heptane. An octane rating of 87 means it’s 87% octane.
It’s a “rating”…
The reason why higher octane is more expensive is because it’s harder to refine the gasoline so that it contains more octane. Now let’s add another wrinkle… the octane is actually an octane rating, or it behaves as gasoline with that percentage octane would behave but might not actually have that much octane in it. While that doesn’t really matter, it does mean that the gasoline you use could have a mix of other things in it (still real gas though) to give it properties of a higher octane without actually having more octane. Does it matter? I don’t think so but I write software for a living.
I know a lot of people who believe that higher octane gas is “better” for your car than lower octane gas, as if the words premium next to the higher ratings actually mean the gasoline is better for your car. It isn’t. If you believe it is, don’t be dismayed, you’ve simply become accustomed to reading the words “premium” next to the label and believing the great marketing machine that helped create over $10B in 4th quarter profits for companies like Exxon-Mobil. The octane rating of gasoline is a measure of how much you can compress the gasoline before it ignites, not how “good” it is.
Cars that require higher octane gas actually need that higher priced gas because the engines compress the fuel more before it ignites it. If you put regular gas in a car that requires premium, the gas will prematurely ignite when it’s being compressed and the engine will give you a knocking sound. This is bad for your car.
Chemists perk up…
For all you burgeoning chemists, gasoline is basically octane and heptane, or hydrocarbon chains that are 8 (octane) or 7 (heptane) carbons long. Octane simply can be compressed better (i.e. without the exploding part, at least at the same levels of pressure) than heptane. An octane rating of 87 means it’s 87% octane.
It’s a “rating”…
The reason why higher octane is more expensive is because it’s harder to refine the gasoline so that it contains more octane. Now let’s add another wrinkle… the octane is actually an octane rating, or it behaves as gasoline with that percentage octane would behave but might not actually have that much octane in it. While that doesn’t really matter, it does mean that the gasoline you use could have a mix of other things in it (still real gas though) to give it properties of a higher octane without actually having more octane. Does it matter? I don’t think so but I write software for a living.
#13
03-07-2006, 09:45 AM
#14
03-07-2006, 10:21 AM
I ran regular for a few months, then stepped up to mid-grade (hey, I'm cheap). After driving a loaner and feeling how "peppy" it was compared to my Coupe, I've recently stepped up to premium. I don't notice a whole lot of performance gains, but my mileage has improved, basically negating the extra cost.
#15
03-07-2006, 10:24 AM
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Originally Posted by giddyup69
why would u spend all this money on a luxury sports coupe that requires premium gas and then cheap out on the regular gas?? boggles my mind. if u can't afford the gas maybe u shouldn't have bought the car... u may have some financial issues to think about. just a thought.
here's a quick article i found online:
here's a quick article i found online: