2002 Lincoln LS Fuel Level and Octane

2002 LINCOLN LS
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COMPANYSPACE
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2002 Lincoln LS V8 68,000 miles.
I want to know if I have been fueling my car with 89 Octane Fuel and not 91 Octane Fuel, will that cause the system a false reading that the Fuel Level Sending Unit needs to be replaced? Can I correct this by burning out the 89 octane fuel and replacing with the 91 octane fuel?
Apr 18, 2007 at 2:45 PM
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SERVICE WRITER
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You should use what ever is stated in the manual, the problems should not affect the level however. Just start putting in what it calls for and anything affected will return to normal.
Apr 18, 2007 at 3:00 PM

Suggested Repair

Use the octane grade specified in the owner's manual. Lower octane should not cause a false fuel level sending unit reading. Switch to the recommended fuel; any related effects should return to normal.

Conversation Summary

The owner of a 2002 Lincoln LS asked whether using 89 octane instead of 91 could falsely indicate a bad fuel level sending unit and whether burning off the lower-octane fuel would correct it. The expert said to follow the manual, that octane should not affect the fuel level reading, and that using the specified fuel should allow anything affected to return to normal.

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