I have a customer that is complaining about gas mileage on a 1994 Buik LeSabre(3800,[...].,at,etc).He claims that for [...] auto has gotten 30-32 mpg.

Now it gets 19-21mpg.I cannot say this(31mpg)is untrue.I have changed MAF sensor,O2 sensor,thermostat,check... Login to read more.