Results 1 to 11 of 11

What kind of gas for the LS1

This is a discussion on What kind of gas for the LS1 within the General Help forums, part of the LSx Technical Help Section category; Hi, I just bought a 1999 Trans Am with the LS1. Problem is that when I was in the States, ...

  1. #1
    Junior Member
    Join Date
    Feb 2011
    Location
    Prague
    Posts
    10
    1999 Trans Am

    What kind of gas for the LS1

    Hi, I just bought a 1999 Trans Am with the LS1. Problem is that when I was in the States, I would put premium, supposedly best 93 octane in my 1997 Trans Am. Now here in Europe, they have 95, 98 and 99 octane gas. Do you guys know the conversions or can I put the 99 octane gas in it without it getting any damage? Thanks

  2. #2
    Senior Member
    Join Date
    Jan 2010
    Location
    texas
    Posts
    1,621

    silver
    2000 formula

    i always use regular unleaded in mine.......cant afford that premium

  3. #3
    Super Moderator
    pajeff02's Avatar
    Join Date
    Feb 2009
    Location
    Mansfield, PA
    Posts
    21,576

    Black & Blue
    '02 WS.6 / '07 Suburban

    Are the European standards for rating octane the same as in the States? If so, you would be best sticking as close to 93 octane as you can. There is absolutely no performance benefit in running a higher octane fuel. In fact, there may be a slight loss of performance. Higher octane only results in more power when the spark advance is adjusted accordingly. Our cars come with a high and low octane spark table -- but it assumes an octane of 91-93 for "high test" fuel.

  4. #4
    Junior Member
    Join Date
    Feb 2011
    Location
    Prague
    Posts
    10
    1999 Trans Am

    Quote Originally Posted by pajeff02 View Post
    Are the European standards for rating octane the same as in the States? If so, you would be best sticking as close to 93 octane as you can. There is absolutely no performance benefit in running a higher octane fuel. In fact, there may be a slight loss of performance. Higher octane only results in more power when the spark advance is adjusted accordingly. Our cars come with a high and low octane spark table -- but it assumes an octane of 91-93 for "high test" fuel.
    Well the thing is that the lowest grade gas you can get here is 95. SO 93 is not even an option.

  5. #5
    None Shall Pass Knight's Avatar
    Join Date
    Jan 2010
    Location
    East of Cleveland, Ohio
    Posts
    3,828

    Black
    99 WS.6 - Modified

    Run the 95. Your car should perform fine. As Jeff said, there's no reason to run a higher octane. I have run 94 in mine without a problem.

  6. #6
    Member c5z28's Avatar
    Join Date
    Apr 2008
    Location
    Bay Area
    Posts
    8,120

    On your ass flashing
    my highbeams

    I know you guys in Europe get a different owners manual than we do here in the states. It should be listed in there what is recommended if you have it. I'll ask around Monday and see if I can't get an answer.

  7. #7
    Electrical Engineer KMdef9's Avatar
    Join Date
    Jul 2009
    Location
    North of the Motorcity
    Posts
    2,611

    Custom Swirly Black
    2001 WS6 M6

    Quote Originally Posted by sjsingle1 View Post
    i always use regular unleaded in mine.......cant afford that premium
    I got significantly worse gas mileage in other vehicles. And it's only $3 more a fill up here for premium as well, so it made for less stops at the gas stations.

    The 95 should be fine, not much difference between that and the 93. The 99 I think would have the effect Jeff mentioned.

  8. #8
    Junior Member
    Join Date
    Feb 2011
    Location
    Prague
    Posts
    10
    1999 Trans Am

    Quote Originally Posted by KMdef9 View Post
    I got significantly worse gas mileage in other vehicles. And it's only $3 more a fill up here for premium as well, so it made for less stops at the gas stations.

    The 95 should be fine, not much difference between that and the 93. The 99 I think would have the effect Jeff mentioned.
    Well I had a Suzuki GSX-R 750 bike and that thing was sooo much faster with the 99 octane fuel - it would do 170mph easy, whereas with the 95 octane, it would have trouble hitting 160mph... But I guess I will just try and see if there is a difference in the TA, since you guys say it should not damage the engine

  9. #9
    O U 8 1 2 Spaz's Avatar
    Join Date
    Nov 1999
    Location
    over here...
    Age
    39
    Posts
    25,693

    []D [] []V[] []D
    1999 trans am

    Quote Originally Posted by vindicator View Post
    Well I had a Suzuki GSX-R 750 bike and that thing was sooo much faster with the 99 octane fuel - it would do 170mph easy, whereas with the 95 octane, it would have trouble hitting 160mph... But I guess I will just try and see if there is a difference in the TA, since you guys say it should not damage the engine
    won't do jack shit unless the engine is tuned for it...

  10. #10
    Junior Member dragon93308's Avatar
    Join Date
    Dec 2005
    Location
    Humboldt County
    Age
    31
    Posts
    14

    silver
    2000 z/28

    The higher the octane you run the higher timing your car can run. That is why more octane means more power.. if you have a way to tune it.

  11. #11
    Smiles for 9.5 Years cammed goat's Avatar
    Join Date
    Jan 2009
    Location
    Paterson/Ridgewood, NJ
    Posts
    11,474

    Phantom Black Metallic
    2004 GTO M6

    I run 93 in mine. Even with the stock replacement motor now.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. what kind of tq arm is this?
    By devildogws6 in forum Suspension and Handling
    Replies: 12
    Last Post: 01-28-2013, 08:01 AM
  2. Question: what kind of hp's from a le cam will i get?
    By stunna p in forum Internal Engine
    Replies: 3
    Last Post: 12-07-2009, 03:57 PM
  3. Question: What Kind of Wax do you use?
    By Mustang Killa in forum Showcar and Detailing
    Replies: 110
    Last Post: 04-20-2008, 08:01 PM
  4. What kind of day did you have???
    By dafizzman1 in forum Almost Anything Goes
    Replies: 23
    Last Post: 10-21-2007, 06:47 PM
  5. What kind of car are you?
    By BIGRED Z in forum Almost Anything Goes
    Replies: 34
    Last Post: 04-20-2006, 06:12 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •