Quote:
Originally Posted by Rokeby
I don't know the specs on your car but, if there is a catalytic converter it too needs to be warmed up. IIRC, this involves an over-rich fuel/air mixture so that some small amount of fuel is burned in the cat converter...
So, to get best MPG in addition to all the other things that must be warmed up,
not just the block and coolant, but wheel bearings, etc, which require
heat/movement/friction = fuel consumed, there's the cat converter as well.
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I have a cat converter, but it doesn't have any sensors (at least I haven't seen any wires). In the engines with a DPF there is an exhaust gas temperature sensor (so the ECU knows how much more fuel to dump to burn out the soot), but mine doesn't have that.
This did give me an idea: stick a heating pad on the cat to get cleaner emissions earlier. Don't some cars already have that?
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e·co·mod·ding: the art of turning vehicles into what they should be
What matters is
where you're going, not
how fast.
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