What is the gas mileage on a 305 Chevy motor?
I going for gas mileage on my 82 Chevy pickup. Should I rebuild the stock 305 or a 350ci. Remember looking for the best mileage.
A new engine is tighter and that causes more friction. If the engine had to be bored / over sized for new and bigger pistons then that will cause poor fuel mileage too. The gas mileage might be down a little at first, but once the engine gets broken in there shouldn't be much difference unless the cam or compression ratio has been changed.
Mileage for this engine can range from as low as 13 mpg to as high as 30 depending on the year, make and model of the vehicle. The quality of fuel, as well as the quality of the lubricating oil used can have an impact on mileage. Driving habits can affect the mileage of any vehicle. That is why all mileage claims advertised always have the disclaimer, "Your actual mileage may vary"....