Brand New 2010 Yaris 5 door automatic, <200 miles, MPG

[rayfloyd170]

Originally Posted by ojeysky

Sorry for coming back late on this, not so much heavy city traffic just normal city driving. I was formerly using conventional oil, I switched to synthetic though I get much quiet engine it didn't improve my milage much.

What could be the problem?

Thanks
PS: No check engine light

Whats your odometer reading now and when was you last preventive maintenance?

mine was about the same as yours at 75k KM then i changed spark plugs, cleaned the throttle body and MAF sensor and replaced the engine air filter during the lube oil change (synthetic all the time).

It made a big difference and the engine is now more economical and powerful than before. Currently at 35.2 - 37.6MPG whereas before it was around 29.4MPG