Got a good idea of my cold start penalty today
 

Today when i had just parked my car after driving home i noticed that i had forgotten my phone at work. Oh well, no choice but to go get it... But i had a chance to see what mileage i would get starting out with a warmed up engine.

On the regular trip i got:
0.64L there over 9.2km giving 6.96L/100km or 33.8MPG
0.69L back over 9.2km giving 7.50L/100km or 31.4MPG

round trip 7.23L/100km or 32.5MPG

On the extra trip that was started with a warm engine i got:
(Imagine a little drum roll here!)
0.36L there giving 3.91L/100km or 60.1MPG!
0.47L back giving 5.11L/100km or 46.0MPG

round trip 4.51L/100km or 52.1MPG

Morning temps about 0⁰C, and 3⁰C on the day for trips 2,3,4.

Wow thats wild! Guess thats why grill blocks seem to be effective for most people, allowin the motor to warm up quicker.
Matt

...and, pre-warming it before you start it up first thing in the morning will get you even better MPG results!

Until i build a fuel based heater the only thing i have to pre-warm it with is happy thoughts.

Wanna help think happy thoughts for Princess?

Jakobnev, was the traffic similar to your normal commute? Could morning jams increase add to your cold consumption?

Traffic was minimal all trips, but on the first one a ¤£@¤ pedestrian triggered a red light by pushing a button - right when i was starting a coast. It might have been 0.61-0.62 instead of 0.64 other wise.

That's a huge difference. if only we could have a block/engine heater that could warm up the engine to normal operating temperature without using 2000kwh :)