New LS1 Owners - Newbie Tech Basic Technical Questions & Advice
Sponsored by:
Sponsored by:

Gas problem

Thread Tools
 
Search this Thread
 
Old Jan 24, 2010 | 11:49 AM
  #1  
brandon9598's Avatar
Thread Starter
On The Tree
iTrader: (1)
 
Joined: Dec 2009
Posts: 132
Likes: 0
Default Gas problem

Crap guys. I let my brother borrow my car yesterday and it was low on gas. It's tuned to only run on premium and I forgot to tell him. He filled it up with regular.. I put some gas treatment stuff in it. I've never ran it on anything but premium so is my car gonna be screwed up?
Reply
Old Jan 24, 2010 | 11:53 AM
  #2  
TheBlueKnight's Avatar
TECH Fanatic
iTrader: (4)
 
Joined: Sep 2008
Posts: 1,971
Likes: 2
From: Nevada
Default

First off. What mods are on your motor and what octane was the tune set to run with? 93, 100?
Reply
Old Jan 24, 2010 | 11:56 AM
  #3  
brandon9598's Avatar
Thread Starter
On The Tree
iTrader: (1)
 
Joined: Dec 2009
Posts: 132
Likes: 0
Default

99 Z28 - LT's, ls6 intake, msd wires, slp intake kit, TB, and it was tuned to run on 93.
Reply
Old Jan 24, 2010 | 12:15 PM
  #4  
TheBlueKnight's Avatar
TECH Fanatic
iTrader: (4)
 
Joined: Sep 2008
Posts: 1,971
Likes: 2
From: Nevada
Default

You do not need to be worried. I'm going to assume he put 87 in it? Detonation is only going to occur at WOT high rpm runs. You may notice, or he may have noticed that if he was flooring it, he may have heard some pinging noises.

All you need to do is pour a can of octane booster in the tank which you already did. For the majority of the rest of the tank don't go WOT or drive at high rpms, just drive normally. Personally I'd wait until about an 1/8th of a tank is left and then fill up with 93 and you'd be good to go.

Same thing happened to me. I bought my car from the dealer and they advised me they had accidentally filled up my car with 87. I had a 200mile drive back home. On the way home I stopped at a gas station and threw a bottle of booster in it and just drove normally.
Reply
Old Jan 24, 2010 | 12:19 PM
  #5  
brandon9598's Avatar
Thread Starter
On The Tree
iTrader: (1)
 
Joined: Dec 2009
Posts: 132
Likes: 0
Default

Alright. Thanks.
Reply
Old Jan 24, 2010 | 09:29 PM
  #6  
araber89's Avatar
TECH Resident
iTrader: (3)
 
Joined: Sep 2007
Posts: 896
Likes: 1
From: Holmes County (thats right Amish Country), OHIO
Default

Yep dad did the same thing with mine when he borrowed the car. Personally I think the car didn't run right over 3k RPMs and it just felt sluggish on power. It was fine to just drive normal. I only had it happen one time when I was below 1/4 on the tank of 87 that it didn't want to idle right for me. I put 93 back in and it started and the RPMs came up it found its idle and ran just fine. You should be fine.

Also I put Octane booster in and it didn't help. I later found out through research that you don't even gain a full octane value that you see on the pump. If its is advertised to gain 10 more octane values you get like .5. Also adding another one would only increase it to .75. So really you would be running 87.5 with one bottle and 87.75 with two.

If your really worried fill it up when it gets to half then again at half. This will dilute it enough. You should be fine and have no problems.
Reply
Old Jan 25, 2010 | 12:08 AM
  #7  
brandon9598's Avatar
Thread Starter
On The Tree
iTrader: (1)
 
Joined: Dec 2009
Posts: 132
Likes: 0
Default

Good haha. Cause it's running like absolute crap. Oh yea and one more thing. My brother told me he floored it after he filled it and it ran really crappy. Would that have messed it up? It isn't throwing any codes or anything just running super sluggish.
Reply
Old Jan 25, 2010 | 02:02 AM
  #8  
brianfromhawaii's Avatar
11 Second Club
iTrader: (3)
 
Joined: Oct 2007
Posts: 857
Likes: 0
From: Hawaii
Default

Originally Posted by brandon9598
Good haha. Cause it's running like absolute crap. Oh yea and one more thing. My brother told me he floored it after he filled it and it ran really crappy. Would that have messed it up? It isn't throwing any codes or anything just running super sluggish.
depending on who tuned it it could still have the low octane timing tables.. if those are there it saw knock and turned down the timing
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Jan 25, 2010 | 06:28 AM
  #9  
teke184's Avatar
TECH Junkie
iTrader: (5)
 
Joined: Feb 2007
Posts: 3,183
Likes: 3
From: Key West, Florida
Default

the computer should compensate to prevent damage.

you'll be better off topping the tank off several times with 93 to boost the octane as much as possible...rather than running it down to almost empty.

adding 5gal of 93 to 10gal of 87 yields 89 octane.
Reply




All times are GMT -5. The time now is 11:05 AM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE