1974 Mercury Comet

Asked by Ida1954 Jul 22, 2018 at 12:25 PM about the 1974 Mercury Comet

Question type: General

I love driving this wonderful car but why does it use SO much gas?

4 Answers
43,870

Hornet_2497 answered 6 years ago

Might need a tune up. If you have the 289 V-8 you can expect to get 16 mpg. The 200 six cylinder should get 20 mpg. Remember those older cars needed leaded gas to protect the valves so don't forget the fuel additive.

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Guru9CGNT1 answered 3 years ago

Be sure to check for vacuum leaks. It can be well worth the time and effort to replace old vacuum hoses. Also, does the carb need to be rebuilt? Over the years (I'm 62), I have found that old cars tend to get numerous vacuum leaks as seals and hoses deteriorate. That will kill an otherwise good vehicle from operating correctly....Good Luck! :-)

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