Gas Mileage with my 2009 Yaris Sedan

[voodoo22]

Originally Posted by Rick

Voodoo22,

How many miles between cold-start cycles are you running? I live in the exurbs and commute into the outer suburbs via 2 lane county roads. I'm close to tank averages of 47 MPG but wonder if it can really get much higher with basically a cold-start cycle every 23 miles. As others have noted, the cold-starts are a big MPG killer.

HI Rick,

averaging 47mpg is fantastic. With numbers like that you don't have much margin of error to gain more, but I'd wager you could get it over 50 at least some times. If you aren't already, try accelerating slower and keeping your speed under 55mph if possible. Supposedly 45mph is the sweet spot. I generally go between 50-55mph on the hwy I travel.

My commute is 52kms or about 32miles each way. The cold start is definitely a killer. I've really put a lot of effort into combining short trips udner 20 kms together or not driving all together when possible. When I recently got my best tank ever of just over 55mpg, I had virtually no short trips that tank, like the 2 km drive to pick my wife up at work.

From what I've read written by people with scan gauges, it takes about 23 kms or 14 miles for our cars to warm up into the optimum operating temperature range.