View Poll Results: Premium or Regular Fuel?
Premium - Nothing but the best for my Garage Queen.
247
93.92%
Regular - I'm sure everything will be fine.
9
3.42%
Midgrade - meh
4
1.52%
Either/Any - I'd like to put High Test in her; but for whatever reason, t
3
1.14%
Voters: 263. You may not vote on this poll
Premium or Regular Gasoline
Thread Starter
Pro
Joined: May 2010
Posts: 696
Likes: 38
From: Niagara Falls Awesome Ends With Me
Premium or Regular Gasoline
What are you running on. How important do you feel it is to use the Preimium stuff. Or does it not matter to you? Don't forget to post in the atttached poll.
Safety Car
Joined: Sep 2007
Posts: 3,816
Likes: 16
From: Anchorage Alaska
St. Jude Donor '08-'09-'10
I use Chevron exclusively, 90 octane. That's premium in Alaska... none of the refineries produce anything higher. At a difference of only $3 per fillup vs. regular unleaded, ($55 vs. $52 at our prices) there's no way I'd ever put the regular into my tank unless there truly was no other option.
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Verdad Gallardo
Pro
Joined: Jan 2008
Posts: 549
Likes: 44
From: Houston TX
I run Premium, and nothing but. (93 octane here.)
As clearly stated in the owner's manual, you can run regular octane if you wish, but doing so causes a fairly large loss in power.
The price difference of 1 tank of premium vs 1 tank of regular is really only a couple bucks. I'd rather use premium, and if I needed to offset that cost difference somehow I would just buy 1 less beer, or 1 less Starbucks, etc. for the week. There's really no point in running regular.
As clearly stated in the owner's manual, you can run regular octane if you wish, but doing so causes a fairly large loss in power.
The price difference of 1 tank of premium vs 1 tank of regular is really only a couple bucks. I'd rather use premium, and if I needed to offset that cost difference somehow I would just buy 1 less beer, or 1 less Starbucks, etc. for the week. There's really no point in running regular.
Safety Car
Joined: Jul 2005
Posts: 3,572
Likes: 9
From: Jackson Tn
St. Jude Donor '06-'07-'08-'09
the smart question should be how much ethanol is in the fuel you buy?
Around here all the fuel is about 10%. There is only on store I have seen selling straight gas and they are proud of it. Our cars come from the factory set up to run on straight fuel and the stoich is set to 14.68:1 afr but if your running e10 then it's going to be @ 14.1:1 afr so the pcm is having to correct for this. Putting regular e10 on top of this is just plain stupid.
here is some good info on the subject: http://en.wikipedia.org/wiki/Air-fuel_ratio
Around here all the fuel is about 10%. There is only on store I have seen selling straight gas and they are proud of it. Our cars come from the factory set up to run on straight fuel and the stoich is set to 14.68:1 afr but if your running e10 then it's going to be @ 14.1:1 afr so the pcm is having to correct for this. Putting regular e10 on top of this is just plain stupid.
here is some good info on the subject: http://en.wikipedia.org/wiki/Air-fuel_ratio
Last edited by printmanjackson; Jun 8, 2010 at 02:02 PM.
Melting Slicks
Joined: Oct 2004
Posts: 3,066
Likes: 0
St. Jude Donor '06
Always Chevron 91...
What's the price difference in Premium and Regular? $0.25? So for the average fill-up, that's a whopping $3.75....
Don't be cheap, put what the car is designed to run.
BTW, neither of our C5's are garage queens.
Nick
What's the price difference in Premium and Regular? $0.25? So for the average fill-up, that's a whopping $3.75....
Don't be cheap, put what the car is designed to run.
BTW, neither of our C5's are garage queens.
Nick
Last edited by Roostertail; Jun 8, 2010 at 02:20 PM.
Tech Contributor
Joined: Dec 2003
Posts: 19,384
Likes: 87
From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
I topped up with premium (98 octane or 94 in US values) last week and it cost me £68. Boy prices have gone up
It was about £50 for a tank only a few months ago.
It was about £50 for a tank only a few months ago.