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Discussion Starter · #1 ·
I accidentally put 1/2 tank of regular fuel vs premium before I realized it, I finished fueling with premium. Will this cause a problem? Thanks, I researched, and didn't see this question! I have a 2002 SL 500.
 

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Departed 1998 SL500 (and the Pano is in Bogota)
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12,180 Posts
Half a tank of lower octane fuel wouldn't hurt it and the engine management controller will compensate for it.
 

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Sith Lord
72 280SE 88 560SEC 92 E500 6.0 95 SL320 14 GLK350
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11,814 Posts
You can always add some octane additive in your tank and increase the volume on your radio.
 

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2007 911 GT3 RS, 1990 420SEL, 2007 S550, 1994 SL500 6.0, 2011 Aston Martin DBS
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522 Posts
Putting in regular fuel might cause bubbles to emit from your exhaust, and the hood might fly up and catapult the engine into a kindergarden in a large fireball.

Please refrain from making this mistake again. Children are at risk..
 

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E350 Sport
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no big deal, just drive it until next gas up.
 
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