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Hello,
I am getting consistently 18 miles a gallon. Suburban driving, i.e. driving mostly between 30 and 40 miles an hour in third gear, rarely go up to 4th gear.
I have changed spark plugs, distributor cap, rotor, fuel filter, and cleaned the throttle body and changed the arrestor flame (got kit from FCPGroton) to plastic one. I also put some 44K injector cleaner recently in my gas tank.
I put higher grade gas (super, 91 octane).
How is 18 miles a gallon for a 1989 manual with 158K miles? Within the accepted boundaries? Shouldn't I be getting 20 or above for suburban driving?
Thanks.
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'89 244DL M47 158K miles
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