Premium or Regular Gas...Which r u using??
Senior Member
Joined: Mar 2008
Posts: 4,535
Likes: 3
From: Houston in my blood, and under my tires...
Re: Premium or Regular Gas...Which r u using??
Originally Posted by brian_omeara07
Gas mileage? What's that 
The extra $0.30/gallon (between 93 and 87) equals about a $4.00 difference each fill up. I only fill up every couple weeks. That means after a few months I've lost out on one nice dinner for myself... I can live with that.
Now go away snow, so I can get worse gas mileage while having a lot more fun.
Senior Member
Joined: Dec 2008
Posts: 1,396
Likes: 1
From: Apple Valley, MN
Re: Premium or Regular Gas...Which r u using??
I regularly use 87, most times 89 and I have never heard a ping or lost acceleration that I noticed that I would get back after putting in 3 tanks of premium. seems the same to me. Always get about 24.8-25.4 mpg no matter what I use.
Senior Member
Joined: Jun 2008
Posts: 1,927
Likes: 26
From: Spacecoast, Florida
Re: Premium or Regular Gas...Which r u using??
Always used Shell Premium from the start until about a month ago when a mom-&-pop place right down the street started selling pure 93. What a difference...much better pep and schmoozness and better mileage to boot!
Senior Member
Joined: Apr 2010
Posts: 2,404
Likes: 8
From: Mendocino, CA
Re: Premium or Regular Gas...Which r u using??
Originally Posted by PNA
Part of that is the lower energy value of ethanol, but not necessarily all of it. You would likely get anywhere from 10-30% reduction. If you were gettting 220 (low end) and now 280 (high end) your mpg on the new fuel is about 3.8 mpg higher with E0. That's just under 30% reduction, which is in line with the high end of the expected reduction based on the ethanol.
I have to say, my XFire get's significantly better gas mileage than that. I don't have an SRT6, and I don't drive it agressively (at least not all the tiime) and I've been getting between 22 and 26 mpg -- and I drive in the worst traffic in the country -- and I know I'm using E10. I guess I should be pretty happy with that.
Just be informed, E10 is in about 90% or more of all gasoline now and likely will be in all of it very soon. It may go higher as well -- up to E15.
I have to say, my XFire get's significantly better gas mileage than that. I don't have an SRT6, and I don't drive it agressively (at least not all the tiime) and I've been getting between 22 and 26 mpg -- and I drive in the worst traffic in the country -- and I know I'm using E10. I guess I should be pretty happy with that.
Just be informed, E10 is in about 90% or more of all gasoline now and likely will be in all of it very soon. It may go higher as well -- up to E15.
Forum Regular
Joined: Apr 2009
Posts: 649
Likes: 0
Re: Premium or Regular Gas...Which r u using??
Premium. Here's why.
Five years ago, I wuz down on money and put mid grade gas into my Buick Riviera for a few weeks.
Problem is, the supercharged Rivvies need premium.
Bottom line is that the harmonic balancer came undone.
Even with cheap **** GM parts, the fix still ran to $460.
With Mistress Mercedes and cuckold Chrysler, your fix could run much higher
Five years ago, I wuz down on money and put mid grade gas into my Buick Riviera for a few weeks.
Problem is, the supercharged Rivvies need premium.
Bottom line is that the harmonic balancer came undone.
Even with cheap **** GM parts, the fix still ran to $460.
With Mistress Mercedes and cuckold Chrysler, your fix could run much higher
Joined: Oct 2010
Posts: 146
Likes: 0
From: Winterville, NC
Re: Premium or Regular Gas...Which r u using??
At the risk of sounding mean...You attribute a failed harmonic balancer to low octane fuel ?? Thats like blaming a flat tire on your windshield wipers 
On another note: Lower octane fuel actually has a higher energy potential per unit of fuel due to burn speed. The Octane is resistance to pre ignition by slowing the burn , lower octane fuel can have higher energy potential by faster burn which makes it more susceptible to Knock or Pre Ignition.
If you can get away with lower Octane and your engine management Doesnt reduce timing due to it sensing knock then you might actually get more performance and mileage from lower octane fuel.
Case in Point. My Motorcycle doesnt have any Knock management and it actually runs better with 87 octane.
However, I do run premium in my Crossfire.
Dont take my word for it, I'm just an engineer with crew time on one of the top sprint car teams in the country.
There are lots of cool articles about it floating around.
http://www.powerchipgroup.com/articles/PET0605.pdf
http://www.wanderings.net/notebook/M...sWorthTheMoney
http://www.mbca.org/forum/lower-octa...higher-mileage
On another note: Lower octane fuel actually has a higher energy potential per unit of fuel due to burn speed. The Octane is resistance to pre ignition by slowing the burn , lower octane fuel can have higher energy potential by faster burn which makes it more susceptible to Knock or Pre Ignition.
If you can get away with lower Octane and your engine management Doesnt reduce timing due to it sensing knock then you might actually get more performance and mileage from lower octane fuel.
Case in Point. My Motorcycle doesnt have any Knock management and it actually runs better with 87 octane.
However, I do run premium in my Crossfire.
Dont take my word for it, I'm just an engineer with crew time on one of the top sprint car teams in the country.
There are lots of cool articles about it floating around.
http://www.powerchipgroup.com/articles/PET0605.pdf
http://www.wanderings.net/notebook/M...sWorthTheMoney
http://www.mbca.org/forum/lower-octa...higher-mileage
Last edited by awilson40; Feb 3, 2011 at 06:48 AM.
Senior Member
Joined: Nov 2008
Posts: 8,488
Likes: 854
From: Upstate SC
Re: Premium or Regular Gas...Which r u using??
Originally Posted by PNA
I have to say, my XFire get's significantly better gas mileage than that. I don't have an SRT6, and I don't drive it agressively (at least not all the tiime) and I've been getting between 22 and 26 mpg -- and I drive in the worst traffic in the country -- and I know I'm using E10. I guess I should be pretty happy with that.
I kinda take the position that if the recommended fuel grade for overall performance is premium, than that's what I run. If you can't afford the fuel, than you bought the wrong car!
Thread
Thread Starter
Forum
Replies
Last Post
xfireohio
Cars For Sale - Archive
10
Jul 20, 2020 12:03 AM
chturner
Parts/Accessories for sale - Archive
19
Oct 14, 2019 04:42 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)