Re: anything i can do to improve fuel efficiency??
Thermostat made a huge difference for me, was struggling in the 29's and 30's now im getting 36+mpg
In mile terms i was getting 360 to the tank now im getting around 420, massive difference,
So is the car running at 90degC? if its running around 65 - 70 until your stuck in traffic then def get the thermostat changed as the car will be running in Cold mode, which is the old age equivalent of having the choke open.
If your thermostat is fine, then u could try those additives or just nurse the car every tank or so, good trick is to keep the car in gear while rolling up to a junction, the engine computer can starve the engine completely of fuel as the momentum of the car is keeping the engine turning, turn on the fuel economy guage and you'll see it hit99mpg while its starving the engine.