Miles per gallon?

kyler said

Hello,

I have a 1966 Valiant 200 with a slant-6 225, 1 barrel carb, and 3-speed automatic transmission. What kind of mileage should I be getting? When I bought the car, I was under the impression it would be somewhere around 18-22 for an average. As it is, I have been calculating 10-11. Why am I getting such poor mileage? It just doesn't make sense to me.

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What slantys can do, and what they do, do...........Your results may vary
They can do excellent on the prairies or at a somewhat constant elevation. Washington has some pretty big elevation changes. Hills take the slanty out of it's comfort zone.One can tune the cruise circuit pretty lean. but if you don't or can't stay in it,then there is no point. An EFI vehicle, on the other hand, has a computer that can do a whole lotta calculations per second, and has a feedback loop, that tries to keep the F/A ratio just right, elevation changes and all.