High Octane
Out Of Control!
Joined: Nov 2001
Posts: 21,014
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From: CA, NV, CO
lol Funny i was just talking about this on the E55 thread. The quick answer to your question is yes! It will make a difference. At least that's how i felt. Go with either 101, 104 or 110. How's your car performing now?
Thread Starter
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Joined: Apr 2004
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From: Orlando
CLS55
Originally Posted by JamE55
Dinko,
Once you put some higher octane gas let the car idle for about 10-15mins and then put some miles on it and you should feel a difference. Worked for me!
Once you put some higher octane gas let the car idle for about 10-15mins and then put some miles on it and you should feel a difference. Worked for me!
I'll give it a try, thanks!
Dinko
Super Member
Joined: May 2004
Posts: 518
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From: UK
987S
Originally Posted by dinko
JamE55, I know
I saw your post and had to ask here!
SLK55AMG, so you're saying it will adapt?
Dinko
I saw your post and had to ask here!
SLK55AMG, so you're saying it will adapt?
Dinko
The difference between 95 and 99RON fuel is pretty obvious so I'm sure you'll be able to feel the change when you try it...... most ECUs take upto 15 miles to adapt to a new octane rated fuel so don't expect an immediate change.
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Thread Starter
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Joined: Apr 2004
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From: Orlando
CLS55
Originally Posted by Chappy
I could possibly see the benefits on a FI car, but my stock CLK55 saw no improvement in performance using 100 Octane unleaded.
Kidding
Dinko
Senior Member
Joined: Oct 2004
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SLK55
Originally Posted by dinko
Now that I have the Kleemann chip, will higher octane fuel help performance?
Dinko
Dinko
MBWorld Fanatic!
Joined: Jul 2002
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From: Hotlanta
AMG
Originally Posted by fredfromny
Gains will be modest unless you get octane specific custom programming that really advances the timing.
Any before/after dyno pulls?
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Joined: Jun 2003
Posts: 960
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From: Socal
06' Clk 500 Cabriolet, 01' CL 55, 00' Clk 430
Originally Posted by SLK55AMG
I don't know for sure but I'd be very surprised if the ECU wouldn't adapt automatically..... most modern sports car ECUs will change the engine timing based on the type of fuel used.
The difference between 95 and 99RON fuel is pretty obvious so I'm sure you'll be able to feel the change when you try it...... most ECUs take upto 15 miles to adapt to a new octane rated fuel so don't expect an immediate change.
The difference between 95 and 99RON fuel is pretty obvious so I'm sure you'll be able to feel the change when you try it...... most ECUs take upto 15 miles to adapt to a new octane rated fuel so don't expect an immediate change.
This is true on some cars but i doubt it on Mercedes. If Mercedes ECU can fully re-adapt because of the higher octane, then why Mercedes need to have 3-4 fuel and timing stages set-up in the ECU? Higher octane fuel allow you to run higher boost.
