Gas: Does your mileage change depending where you get your fuel?
Registered User
Joined: Dec 2009
Posts: 24
Likes: 3
From: Philadelphia
Diamond Graphite - stock except for Borla Exhaust and my trusty Michelins
nothing but sunoco 93 - i was probably the only person who was seriously upset when they stopped selling 94 octane!
Chevron with Techron 93 
This is the only gas I'll use simply cuz its free for me
Never tried Sunoco cuz I always felt they were a cheap brand but its true they make race gas but I think thas just specifically for Nascar and not for the public... Down here in Miami i've yet to see a 94 octane... Soon and if I do im there though
This is the only gas I'll use simply cuz its free for me Never tried Sunoco cuz I always felt they were a cheap brand but its true they make race gas but I think thas just specifically for Nascar and not for the public... Down here in Miami i've yet to see a 94 octane... Soon and if I do im there though
Registered User
Joined: Nov 2009
Posts: 466
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From: Winnipeg, MB (Biggest/Coldest city in the world)
i think it definetly does make a difference, on a trip from Colorado to winnipeg (1200 miles) i got different gas mileage then what I do now that I am back in my home city. I found shell to be a good gas, I filled up with them as much as I could, I even filled with 92 at some gas station (sorry can't remember the name, but it was a common retailer) and it seemed to last me less time then the shell at 91 did.
I know it is a minor difference between 91 and 92, but you wouldn't expect the 91 to go further. But who knows, the gas station basically gets a new batch of gas every week or w/e, sometimes they get a good one, sometimes not. Also, lets be honest, driving a g35 doesn't give the best measure of gas mileage, sometimes you drive aggresively, other times smoothly/effeciently.
I know it is a minor difference between 91 and 92, but you wouldn't expect the 91 to go further. But who knows, the gas station basically gets a new batch of gas every week or w/e, sometimes they get a good one, sometimes not. Also, lets be honest, driving a g35 doesn't give the best measure of gas mileage, sometimes you drive aggresively, other times smoothly/effeciently.
Registered User
Joined: Nov 2009
Posts: 32
Likes: 0
if you are switching back and forth you really can't compare them since you have a mixture of the 2 in the tank.
I used to just get any gas but this last spring i switched over to shell 93 vpower only. That's all i use now and my mileage has gone up. I was barely getting 23mpg before and now i'm 26mpg now. That is the average for the entire tank which i reset everytime i fill up. I've always had the car aligned at the same place every 6 months and delt with the low 20's for 2 years before i made the switch. Since i made the switch on gas my car has been a few mpg better.
I tried the same thing in my s-10 daily driver and going from random 87 octane to only using shell 87 octane (always from the same gas station near my house) and i'm getting mid 20's and before i never broke 20mpg. I was even over 20mpg for a tank with over 100 miles pulling a trailer.
I used to just get any gas but this last spring i switched over to shell 93 vpower only. That's all i use now and my mileage has gone up. I was barely getting 23mpg before and now i'm 26mpg now. That is the average for the entire tank which i reset everytime i fill up. I've always had the car aligned at the same place every 6 months and delt with the low 20's for 2 years before i made the switch. Since i made the switch on gas my car has been a few mpg better.
I tried the same thing in my s-10 daily driver and going from random 87 octane to only using shell 87 octane (always from the same gas station near my house) and i'm getting mid 20's and before i never broke 20mpg. I was even over 20mpg for a tank with over 100 miles pulling a trailer.
Avoiding potholes
Joined: Apr 2006
Posts: 11,682
Likes: 150
From: SF Bay Area
To answer the Op's q, I used 76 for a bit but Chevron or Shell seems to "feel" better.
Maybe I'm crazy, but in cold weather there seems to be less noise at low rpm.
I haven't put anything other than 91 in it since I bought the G new at the end of 2005.
Registered User
iTrader: (10)
Joined: Jun 2006
Posts: 2,374
Likes: 14
From: Ladera Ranch / San Clemente
Nothing but Chevron for my G or 100 Octane from Union 76 when they have it. As far as gas mileage goes...I don't even keep track anymore...my car drinks gas.
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