Got a good idea of my cold start penalty today

[jakobnev]

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.

[66sprint6]

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

[gone-ot]

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

[jakobnev]

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?

[Piwoslaw]

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

[jakobnev]

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.

[GRU]

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