Thread: mileage drop
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Old 06-10-2002, 11:03 AM
hs_300e hs_300e is offline
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Join Date: Apr 2002
Location: Dallas Area
Posts: 369
mileage drop

During a cold start, I had to crank my '86 300E (69,000 mi) a little longer to get it to start. When the engine was warm, there were no starting problems.

So as a first step, I used a bottle of Techron Fuel Injector Cleaner. Since that, my mileage has dropped from 21 mpg to 18 mpg.

(With the techron treatment, there was a slight improvement in the cold starting.)

Any suggestions to bring it back up is greatly appreciated.

Thanks in advance.

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