The engine and catalytic converter have to reach their optimal oper -
ating temper ature
to reduce fuel consumption and noxious emis -
sions effective ly.
Just after starting, a cold engine in a mid -size car only achieves a
fue l economy of 6-8 miles per gallon (30-40 1/100k m ). After about a
half a mile, fuel economy climbs to 12 mpg (201/100 kml. After about
2.5 miles (4 km), the engine is at its proper operating temperature
and fuel economy has reached a normal level. So you can see that
you should avo id short tr ips whenever possib le.
The
outs ide temperat ure is also critical in this regard. Your car
consumes more fuel in the winter than in the summer. •
Controls and equip-
ment
Safety first Vehicle operation
Driving a nd e nvironm e nt
Vehicle care Do-it-yourself service Technical data
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