As I stated in another post quoted below, 87 octane did not cause the car to have a run problem nor will it have caused any damage. Modern cars will reduce ignition timing to compensate for the lower octane.
The short story is take it to a competent shop and let them fix it, you will just be guessing and randomly changing parts.
https://www.peachparts.com/shopforum/tech-help/396561-2003-c320-running-rough.html
Old 12-19-2018, 07:34 PM
97 SL320
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Join Date: Jan 2012
Posts: 7,028
Quote:
Quote:
Originally Posted by TheBishop View Post
The last few drives in my wife's 2003 C320 I noticed it was running rough.
She told me not to put super because it cost more.
I found out she has been putting regular gas in the car for a year.
I fussed at her and blamed the cars condition on low octane fuel.
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97 SL320 is online now
Better buy her something good for Christmas, regular fuel won't cause a rough idle. About all that will happen is a slight reduction of max power due to ignition timing reduction. At part throttle you won't likely notice a difference.
06-19-2019, 06:39 PM
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