gas mileage - Pontiac G6 Forum
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post #1 of 18 (permalink) Old 01-24-2006, 11:51 AM Thread Starter
 
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gas mileage

Has anyone gotten bad gas mileage when they first got their car. I know alot of my driving has been city, but the first 100 miles that I put on my car used 1/2 a tank. Is this normal? Thanks in advance.

P.S., forgot to mention that i haven't been beating on it, been taking it easy on the gas.

Last edited by CACTIDEVIL; 01-24-2006 at 12:21 PM.
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post #2 of 18 (permalink) Old 01-24-2006, 12:21 PM
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1/2 tank used for 100 miles is excessive. What brand of gas do you use?

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post #3 of 18 (permalink) Old 01-24-2006, 12:22 PM Thread Starter
 
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Dealer put shell in, but they used 87 octane, and who knows the quality of shells gas in the ghetto where they filled it up at.
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post #4 of 18 (permalink) Old 01-24-2006, 12:38 PM
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Quote:
Originally Posted by CACTIDEVIL
Dealer put shell in, but they used 87 octane, and who knows the quality of shells gas in the ghetto where they filled it up at.
shell gas is approved by GM standards (i know this because it's the only station around here that is). though if it sat for a long time it could go bad.

let us know when/if you find out what's up.
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post #5 of 18 (permalink) Old 01-24-2006, 04:47 PM
 
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I've got 1400 miles. I've been getting about 20mpg with my GTP combined city and highway.
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post #6 of 18 (permalink) Old 01-25-2006, 05:09 AM
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After 3,106 miles (5 000 Km.Canada) my average milage (combined city/highway) per gallon is 28 to 29 miles per gallon. I own a 6 speed GTP Coupe.
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post #7 of 18 (permalink) Old 01-25-2006, 05:11 AM
 
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https://www.g6ownersclub.com/forum/showthread.php?t=816

this thread also addresses this issue
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post #8 of 18 (permalink) Old 02-09-2006, 08:46 PM
 
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When I first got my G6 last June I had brutal fuel economy, it was 18 L per 100 km (metric system..I'm up in Canada eh) and it came down to 14.7L/100km for a while, until about 1800 or 2000 km....ever since then it has gotten better and better, since it has fully broken in now. I only put premium in it now, and that further increases the fuel economy (I get better than what the sticker says I should be).
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post #9 of 18 (permalink) Old 02-09-2006, 08:56 PM
 
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I have 10,500 miles now on my '06 GTP coupe w/ A4 and I'm getting 25 mpg avg. I can get as much as 28-29 on my drive into work ( 82 miles one way , all turnpike, mostly flat ground, 70 mph ) using mainly Shell and BP 87 oct. I guess for how much fun this car is, it's acceptable to me. I knew it wasn't going to be an economy king.
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post #10 of 18 (permalink) Old 02-10-2006, 02:33 AM
 
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Quote:
Originally Posted by sportredG6owner
I only put premium in it now, and that further increases the fuel economy (I get better than what the sticker says I should be).
No offense man, but premium fuel is a waste of money on a car designed for 87 octane. Premium is designed for higher compression engines, to prevent premature detonation. It has no other benefits.
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post #11 of 18 (permalink) Old 02-10-2006, 02:57 PM Thread Starter
 
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I've been putting 89 octane in my 3.5 v-6, rather put that than 87.
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post #12 of 18 (permalink) Old 02-10-2006, 03:27 PM
 
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^ You're just throwing that money away...
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post #13 of 18 (permalink) Old 02-11-2006, 12:13 AM
 
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^ Agreed. There is no benefit to using anything higher than 87 octane in these engines.
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post #14 of 18 (permalink) Old 02-11-2006, 10:45 AM
 
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I get 11.8 KM/100km
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post #15 of 18 (permalink) Old 02-16-2006, 12:13 PM
 
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Took My Car On A 600 Mile Trip Down I-95 From Jersey To Nc Got 31.2 Mpg.

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