Regular or Premium GAS - Chrysler 300C Forum: 300C & SRT8 Forums
Performance General Discussion Discussion about performance enhancing modifications. Please select the appropriate sub-forum performance classifications.

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 52 (permalink) Old 08-29-2009, 10:25 PM Thread Starter
Junior Member
Points: 1,982, Level: 1 Points: 1,982, Level: 1 Points: 1,982, Level: 1
Level up: 99% Level up: 99% Level up: 99%
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: May 2009
Posts: 24
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Regular or Premium GAS

I have a 2007 srt8. I read in here somebody to the most part burns regular instead of premium. Does anyone else do this? Is this ok to do? need some feed back..thanks
usslasalle is offline  
Sponsored Links
Advertisement
 
post #2 of 52 (permalink) Old 08-29-2009, 10:42 PM
Major Contributing Member
Points: 30,507, Level: 1 Points: 30,507, Level: 1 Points: 30,507, Level: 1
Level up: 99% Level up: 99% Level up: 99%
Activity: 0% Activity: 0% Activity: 0%
 
xiaolong's Avatar
 
Join Date: Jul 2007
Posts: 1,129
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by usslasalle View Post
I have a 2007 srt8. I read in here somebody to the most part burns regular instead of premium. Does anyone else do this? Is this ok to do? need some feed back..thanks

SRT8 is designed for premium for optimum performance.
87 is not good enough, u lose power and may harm your car over time?(correct me if im wrong here)
i use ONLY 93, and ONLY ethanol-free. if you have that available, that is what you need to use.
u bought a special vehicle that requires special maintenance, i.e. synthetic oil, premium gas, premium brakes, premium tires.
dont go cheap to save LESS THAN $5 per fillup.




Diablo Predator
CMR Custom Tune by Xtreme Horsepower
Resonator Delete
AirHammer CAI
185 Tstat
406hp, 420tq (on occasion)
The SRT8 is gone, but not forgotten.....
Now: 1992 SC300-2JZ-GTE swap, 72MM turbo, E85 and more....

Last edited by xiaolong; 08-29-2009 at 10:44 PM.
xiaolong is offline  
post #3 of 52 (permalink) Old 08-29-2009, 11:16 PM
Senior Contributing Member
Points: 12,818, Level: 1 Points: 12,818, Level: 1 Points: 12,818, Level: 1
Level up: 99% Level up: 99% Level up: 99%
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Apr 2007
Location: Edmonton, Alberta
Posts: 931
Thanks: 1
Thanked 20 Times in 18 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
your knock sensors will dial back your timing if you use 87. so you shouldnt be doing any damage.

so if you dont care about performance(which wouldnt make sense if you bought an SRT in the first place), then go ahead and run 87.

but the car is designed to run 91. so for the extra $2 per tank of fuel, why not just run the premium??

2006 300C SRT-8 Black-VORTECH SUPERCHARGED, Magnaflow cats, Corsa Cat-back, DSS 1000hp Axles, 22" MHT Stiletto Forged rims, Nitto420's, Hotchkis Sway Bars, KW V2's, Big stereo, Compustar Alarm, VIP300C deep dish grill and eyelids, Tinted windows. SOLD!

2012 Chrysler 300 SRT-8, Black

2006 Dodge Viper SRT-10, GTS Blue- Cat Delete, Corsas, K&N CAI, SCT, MGW Shifter, MCS Coilovers

2011 Dodge Ram 2500 Laramie White- Deleted, H&S Tuner
Someguys300c is offline  
post #4 of 52 (permalink) Old 08-30-2009, 12:16 AM
Lifetime Premium Member
Points: 118,398, Level: 1 Points: 118,398, Level: 1 Points: 118,398, Level: 1
Level up: 99% Level up: 99% Level up: 99%
Activity: 5% Activity: 5% Activity: 5%
 
srt8man's Avatar
 
Join Date: Mar 2006
Location: Maryland
Posts: 6,500
Thanks: 63
Thanked 78 Times in 62 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
As others have stated, the SRT8 was designed for performance, and premium fuel is recommended. Your SRT8 will produce less power with the lower octane fuel and I would not recommend trying to save a little money at the sacrifice of performance. If you want to save money on fuel, don't own an SRT8. It's that simple.

Take care,
Ken (srt8man)

2013 Shelby GT500 - New!

2008 300C SRT8 (Inferno Red) - Sold
DiabloSport Predator (93 Octane Tune), Jet 180* t-stat (JET-10183)
Toyo Proxes 4 --245/45 Front, 275/40 Rear
Option Groups 1 & 2, Power Sunroof, 13 Kicker SRT Speakers
Capitol Raceway, Crofton, MD: 12.861 @ 111.53 mph
75-80 Dragway, Monrovia, MD: 12.905 @ 109 mph
srt8man is offline  
post #5 of 52 (permalink) Old 08-30-2009, 03:15 AM
Senior Contributing Member
Points: 12,818, Level: 1 Points: 12,818, Level: 1 Points: 12,818, Level: 1
Level up: 99% Level up: 99% Level up: 99%
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Apr 2007
Location: Edmonton, Alberta
Posts: 931
Thanks: 1
Thanked 20 Times in 18 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by srt8man View Post
As others have stated, the SRT8 was designed for performance, and premium fuel is recommended. Your SRT8 will produce less power with the lower octane fuel and I would not recommend trying to save a little money at the sacrifice of performance. If you want to save money on fuel, don't own an SRT8. It's that simple.

the thing that really gets to me, on this subject. is some people have the idea that this is giong to save u a lot of money. but really, how much gas does the average person burn?? like a tank a week?? so the 2$ you save on a tank, times 52 weeks in a year. and you saved a whopping 104$, for an entire year. hardly seems worth it to me.
Someguys300c is offline  
post #6 of 52 (permalink) Old 08-30-2009, 09:59 AM
Lifetime Premium Member
Points: 118,398, Level: 1 Points: 118,398, Level: 1 Points: 118,398, Level: 1
Level up: 99% Level up: 99% Level up: 99%
Activity: 5% Activity: 5% Activity: 5%
 
srt8man's Avatar
 
Join Date: Mar 2006
Location: Maryland
Posts: 6,500
Thanks: 63
Thanked 78 Times in 62 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Yes, I even know some people who try to save money by alternating a half tank of regular followed by a half tank of premium. I would think this may even be worse because the computer is constantly trying to learn a different blend of fuel. Those people would be saving almost nothing. With a high-performance car, I want to extract every bit of performance possible. Using the recommended fuel seems like a no brainer to me. I suppose that in a pinch if there was no premium fuel available and you are completely out of fuel, using some regular would be okay though.

Quote:
Originally Posted by Someguys300c View Post
the thing that really gets to me, on this subject. is some people have the idea that this is giong to save u a lot of money. but really, how much gas does the average person burn?? like a tank a week?? so the 2$ you save on a tank, times 52 weeks in a year. and you saved a whopping 104$, for an entire year. hardly seems worth it to me.

Last edited by srt8man; 08-30-2009 at 07:51 PM.
srt8man is offline  
post #7 of 52 (permalink) Old 08-30-2009, 10:21 AM
Senior Member
Points: 2,445, Level: 1 Points: 2,445, Level: 1 Points: 2,445, Level: 1
Level up: 99% Level up: 99% Level up: 99%
Activity: 0% Activity: 0% Activity: 0%
 
Join Date: Apr 2006
Location: Summerland, B.C.
Posts: 394
Thanks: 0
Thanked 2 Times in 2 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I have run regular many times, does not seem to effect power, I run 90 with 10% ethnol, that is regular with ethnol, all the time, to no bad effect, I still average 18.9 mpg (US) i currently have 116,000 miles on car, same plugs
Lucky is offline  
post #8 of 52 (permalink) Old 08-30-2009, 10:52 AM
Lifetime Premium Member
Points: 118,398, Level: 1 Points: 118,398, Level: 1 Points: 118,398, Level: 1
Level up: 99% Level up: 99% Level up: 99%
Activity: 5% Activity: 5% Activity: 5%
 
srt8man's Avatar
 
Join Date: Mar 2006
Location: Maryland
Posts: 6,500
Thanks: 63
Thanked 78 Times in 62 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
It absolutely does affect power. I'm guessing that the difference is probably 10-20 hp at peak RPM (depending on make and model of course), so you may only feel the difference at WOT. Back when I owned a G35 sedan, the dealer would loan me another G35 when mine was in the shop. My G35 always felt faster and I'd be willing to bet that at least part of that difference was because most people probably topped the loaner off with regular before returning it - that's exactly what I always did.

Maybe some forum members have experimented on the dyno with different types of fuel and I'll let them help out here. I recall an article in Car and Driver magazine on the Pontiac G8 GT, and they showed the power with premium vs. regular, and the difference was substantial. People here are changing their intakes and doing other mods for far less improvement. Using the proper fuel is the simplest way to get more power. If one doesn't care about more power, it raises the question "Why drive an SRT8?".

Quote:
Originally Posted by Lucky View Post
I have run regular many times, does not seem to effect power, I run 90 with 10% ethnol, that is regular with ethnol, all the time, to no bad effect, I still average 18.9 mpg (US) i currently have 116,000 miles on car, same plugs

Last edited by srt8man; 08-30-2009 at 10:54 AM.
srt8man is offline  
post #9 of 52 (permalink) Old 08-30-2009, 11:22 AM
Junior Member
Points: 566, Level: 1 Points: 566, Level: 1 Points: 566, Level: 1
Level up: 99% Level up: 99% Level up: 99%
Activity: 0% Activity: 0% Activity: 0%
 
TwiztedPrez's Avatar
 
Join Date: Apr 2009
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by usslasalle View Post
I have a 2007 srt8. I read in here somebody to the most part burns regular instead of premium. Does anyone else do this? Is this ok to do? need some feed back..thanks
If you want to use 87 octane, I'll trade you my Touring. That way that SRT8 will be used the way it was meant to be.

2005 CV Chrysler 300 Touring

[_] 24x9.5" Verde Madonna's
[_] 255/30/24 Nitto Tires
[_] 20% Window Tint
[_] RF Components, Alpine Subwoofers/Deck, and RF Amps
[_] Whelen 90W 6-strobe setup
TwiztedPrez is offline  
post #10 of 52 (permalink) Old 08-30-2009, 12:04 PM
Super Moderator
Points: 29,406, Level: 1 Points: 29,406, Level: 1 Points: 29,406, Level: 1
Level up: 99% Level up: 99% Level up: 99%
Activity: 14% Activity: 14% Activity: 14%
 
Join Date: Oct 2005
Location: sunny florida
Posts: 7,696
Thanks: 17
Thanked 128 Times in 119 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
interesting

seeing as how Lucky runs his up and down the "Coke" at 270+ KPH, I guess that Canadian ethanol blend is all right!

But yeah, the prevailing wisdom sez if you're tuned for it use it. The important part to remember is that you cannot harm the engine by using lower octane fuel. The stock knock sensor programming is very aggressive, and retards the spark at the slightest bit of knock/pre-ignition.

"In a democracy, dissent is an act of faith."
J. William Fulbright


Steve
06 300C SRT8 all stock
Best ET-12.79 Best trap speed-111 mph. ESP on!
I finally have my software! Happy Diablo owner.

My Favorite "old car"... 73 Super Duty 455 Trans Am - 13.08 @109 mph when brand new! Just try and find one now!
stevesrt8 is offline  
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Chrysler 300C Forum: 300C & SRT8 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
premium gas? AP24LA General Discussion 6 11-03-2008 05:29 AM
Regular of Premium? Super-Sean Australia / NZ Forum General Discussion 13 05-16-2008 05:53 AM
Is it just me or do our cars run better on premium gas? MoparCanuck General Discussion 15 05-27-2007 08:08 AM
premium gas... ouch zmw 1st Gen SRT8-Specific General Discussion 50 05-24-2007 07:42 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome
Inactive Reminders By Icora Web Design