C219 CLS55 and CLS63, 2004-2010

Gas!!

Old Mar 6, 2007 | 07:24 PM
  #1  
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Gas!!

Has anybody put anything other than 92 octane in the tank? What happens when you put a lower octane in? What happens when you put a higher octane?
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Old Mar 6, 2007 | 08:36 PM
  #2  
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From: Frederick, MD
'72 Suburban
Originally Posted by barman85
What happens when you put a lower octane in?

If you drive gently, nothing happens. The car runs as normal. If you accelerate quickly/apply heavy load to the engine, you will get some knock activity. The ECU will detect that knock activity, reduce timing and reduce power.


Originally Posted by barman85
What happens when you put a higher octane?

There is a set amount of timing advance built into the ECU. It will not advance the timing past that point, which is set for high octane pump gas (91-92?), so using higher octane (like race gas) is useless.
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Old Mar 7, 2007 | 02:47 AM
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From: Fresno, Cali
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I was burning 93 in Europe, and 91 here in Cali, can't tell a difference.
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Old Mar 7, 2007 | 03:04 AM
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If you dont put anything better then 91 in your car you shouldnt be driving a benzo. We just talked about this in another post.. look for Gas???.
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Old Mar 7, 2007 | 10:21 PM
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From: California
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Originally Posted by shanetoast
If you dont put anything better then 91 in your car you shouldnt be driving a benzo. We just talked about this in another post.. look for Gas???.
I've only put 91 in my car so far. I shouldn't be driving a benzo! ? Should I give it to you? Maybe than you can put higher octane in it.
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Old Mar 8, 2007 | 03:19 AM
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No but im just saying if you can afford the extra 0.02cents per gallon. Then the car isnt for you.
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Old Mar 9, 2007 | 04:48 PM
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Originally Posted by shanetoast
No but im just saying if you can afford the extra 0.02cents per gallon. Then the car isnt for you.
Here in the Central Valley 91 is the only crap that you can buy but the air sure is clean.
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Old Mar 9, 2007 | 04:51 PM
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The idea of putting lower octane into your tank has been discussed quite often, just do a search

If you get a ECU tune, you can run higher octane gas with decent results.
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Old Mar 10, 2007 | 03:41 PM
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Originally Posted by shanetoast
No but im just saying if you can afford the extra 0.02cents per gallon. Then the car isnt for you.
S.Toast: Are you in So Cal? I live near Long Beach -- where do you get higher than 91 octane gas?

To Anyone: Will my SL500 run better on 93 octane or is it just helpful to cars with a higher level of tuning -- like your AMGS?
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Old Mar 10, 2007 | 07:52 PM
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From: Long beach
Originally Posted by mebeJOE
S.Toast: Are you in So Cal? I live near Long Beach -- where do you get higher than 91 octane gas?

To Anyone: Will my SL500 run better on 93 octane or is it just helpful to cars with a higher level of tuning -- like your AMGS?
I have a friend that lives in La Habra, and theres a gas station where he lives that has it. If your serious about getting the gas i can find out the cross streets for you. There actually is a place its a 76 gas station it has 100 octane, i used if for my dirt bikes. Its on the border of North longbeach and Compton. They dont have it at the pumps you have to go in and ask for it. I take a 5 Gallon jug and the fill it up. In your case it will be your car. Good luck i hope you find the gas station. If you still need help PM me and ill do my best to try and find the gas stations exact address for you.
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Old Mar 18, 2007 | 03:33 PM
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From: So. Cal.
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Originally Posted by shanetoast
I have a friend that lives in La Habra, and theres a gas station where he lives that has it. If your serious about getting the gas i can find out the cross streets for you. There actually is a place its a 76 gas station it has 100 octane, i used if for my dirt bikes. Its on the border of North longbeach and Compton. They dont have it at the pumps you have to go in and ask for it. I take a 5 Gallon jug and the fill it up. In your case it will be your car. Good luck i hope you find the gas station. If you still need help PM me and ill do my best to try and find the gas stations exact address for you.
There is also a place in Pasadena, a 76 station, that has 100 octane racing gas -- it is right at the end of the 110.

But I was under the impression that you were using 93 octane in your car. I guess I misunderstood.

Will such high octane hurt the engine? Or is it a general rule that the higher the octane, the better?
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