Thread: Gas Mileage
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Old 09-14-2000, 08:45 AM
Posts: n/a
This is unusal. I used to get 17-18 mpg under city-highway driving on my 300, but lately I am getting over 20 mpg in the last 4 months, what gives?

Can a car get better gas mileage with age? Also, I need to change my spark plugs because they are older than a year with > 20,000 miles on them, but the car is running better than after last tuneup. What gives?

'89 420 SEL
'90 300 SEL
'68 Olds 88 Convertible
'84 300 SD (sold it)
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