My gut feeling from many years of varied vehicles is that 30 mpg is fine for this auto vehicle.
Ingredients High potency propolis 50 %, MPG (mono propylene glycol) Cautions Not recommended for people with an allergy to tree resin.
I have had it on two cars and enjoyed perfect unleaded conversion and better MPG on both.
In 2012, Toyota began offering the Prius Plug-In, which is capable of getting 87 miles per gallon (mpg).
When considering wind power for your home, wind speed should be at least 10 mpg on average.