Engine, Drivetrain & Forced-Induction
Have Technical Questions or Done Modifications to the G37? Find out the answer in here!

Premium Gas Recommended or Required?

Thread Tools
 
Search this Thread
 
Old 05-08-2008, 11:54 AM
  #1  
G37-Forever
Registered User
Thread Starter
 
G37-Forever's Avatar
 
Join Date: Nov 2007
Posts: 170
Likes: 0
Received 0 Likes on 0 Posts
Premium Gas Recommended or Required?

My current car says 'Premium fuel Recommended' I was wondering if the G37 is the same way? Does anyone know if it is completely safe to use regular unleaded, with the only consequence being reduced performance? In California they only offer 91 Octane anyway for premium (unlike all other 49 states that contain the real 'premium' at 93 Octane) so I'm not getting top performance with CA premium.

Last edited by G37-Forever; 05-08-2008 at 12:04 PM.
Old 05-08-2008, 12:00 PM
  #2  
Gamedog
Sam Rothstein
iTrader: (9)
 
Gamedog's Avatar
 
Join Date: Feb 2008
Location: Riverside/San Diego, CA
Posts: 10,435
Likes: 0
Received 8 Likes on 8 Posts
I live in Cali and Premium is all I put in my tank.... Oh and I think it says "Premium Unleaded Fuel Only" on the inside of the Fuel Filler Door... Maybe not those exact words but something along the lines of that...

Last edited by Gamedog; 05-08-2008 at 12:03 PM.
Old 05-08-2008, 01:35 PM
  #3  
Blackjack
Super Moderator
iTrader: (3)
 
Blackjack's Avatar
 
Join Date: Jan 2005
Location: The ATL
Posts: 9,923
Likes: 0
Received 8 Likes on 6 Posts
Premium Unleaded Fuel Only
Old 05-08-2008, 01:49 PM
  #4  
weave
Registered User
 
weave's Avatar
 
Join Date: May 2008
Location: Northern Virginia
Posts: 448
Likes: 0
Received 1 Like on 1 Post
The book says 91+ but it CAN run on 89 NOT 87 octane.
Old 05-08-2008, 02:02 PM
  #5  
bill90879
Registered User
 
bill90879's Avatar
 
Join Date: Nov 2007
Posts: 62
Likes: 0
Received 0 Likes on 0 Posts
I'm on a 2 year lease... 87 Octane all the way... havent noticed any problems at all... people tell me that the problems will come, but I wont have the car by then so I dont care...
Old 05-08-2008, 02:10 PM
  #6  
finagle69
Registered User
iTrader: (3)
 
finagle69's Avatar
 
Join Date: May 2006
Location: Sacramento, CA
Posts: 2,929
Likes: 0
Received 5 Likes on 3 Posts
our engines run on an 11:1 compression ratio.

87 octane will spontaneously ignite, causing pinging, at that ratio. 89 octane is probably fine, but i use premium.
Old 05-08-2008, 02:14 PM
  #7  
bill90879
Registered User
 
bill90879's Avatar
 
Join Date: Nov 2007
Posts: 62
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by finagle69
our engines run on an 11:1 compression ratio.

87 octane will spontaneously ignite, causing pinging, at that ratio. 89 octane is probably fine, but i use premium.
ya I knew there some explanation like that... I'm gonna try the 94 octane next time to see how much of a difference in power I feel...if its substantial enough, I might just start using that instead...
Old 05-08-2008, 02:34 PM
  #8  
todd92
Registered User
 
todd92's Avatar
 
Join Date: Jan 2008
Posts: 216
Likes: 0
Received 0 Likes on 0 Posts
G37 Premium recommended
G37S Premium required
Old 05-08-2008, 02:36 PM
  #9  
gan78mao
Registered User
iTrader: (1)
 
gan78mao's Avatar
 
Join Date: Sep 2007
Location: SoCal, Irvine
Posts: 2,880
Likes: 0
Received 1 Like on 1 Post
^ i believe the motor is exactly the same!
and ur brakes, suspension, and body kit do not gas at all!haha!
Old 05-08-2008, 02:46 PM
  #10  
Genome
Registered User
 
Genome's Avatar
 
Join Date: Apr 2008
Location: Pittsburgh, PA
Posts: 174
Likes: 0
Received 0 Likes on 0 Posts
Seems selfish, Bill...

...to screw a guy who'll probably end up on the forum looking for help with engine trouble so you could save a couple of bucks...IMO
Old 05-08-2008, 03:32 PM
  #11  
todd92
Registered User
 
todd92's Avatar
 
Join Date: Jan 2008
Posts: 216
Likes: 0
Received 0 Likes on 0 Posts
The ECU have different tunes.
Old 05-08-2008, 03:34 PM
  #12  
Blackjack
Super Moderator
iTrader: (3)
 
Blackjack's Avatar
 
Join Date: Jan 2005
Location: The ATL
Posts: 9,923
Likes: 0
Received 8 Likes on 6 Posts
Originally Posted by todd92
G37 Premium recommended
G37S Premium required
This is because they feel people with the S drive their cars a bit more aggressive.
Old 05-08-2008, 03:37 PM
  #13  
TerribleONE453
Registered User
 
TerribleONE453's Avatar
 
Join Date: Oct 2007
Location: Chatsworth CA
Posts: 4,404
Received 5 Likes on 2 Posts
91 only...
Old 05-08-2008, 03:55 PM
  #14  
wheelsun
Registered User
iTrader: (1)
 
wheelsun's Avatar
 
Join Date: Oct 2007
Location: West Covina, CA
Posts: 368
Likes: 0
Received 0 Likes on 0 Posts
91 only over here..not risking my motor
Old 05-08-2008, 04:14 PM
  #15  
RedlineSi
Registered User
 
RedlineSi's Avatar
 
Join Date: Nov 2007
Location: Twin Cities
Posts: 229
Likes: 0
Received 0 Likes on 0 Posts
lol. With an 11:1 Compression ratio running anything less than 91 is idiotic.


Quick Reply: Premium Gas Recommended or Required?



All times are GMT -4. The time now is 12:12 PM.