Because math is fun, I decided to figure out how many times we will need to stop for gas on our trip down to Myrtle Beach.
According to the Fuel Consumption Ratings dataset provided by Natural Resources Canada our 2017 Kia Sedona LX+ has the following fuel consumption ratings:
City: 13.2 L / 100 km
Highway: 9.7 L / 100 km
Combined: 11.6 L / 100 km
Probably at least 95% of our driving will be highway driving so we should be able to do better than the combined value of 11.6 L / 100km. To be safe we’ll assume 80% highway driving and 20% city.
We’re also assuming a fully loaded minivan with 3 adults and 3 children won’t consume extra fuel.
\begin{align}
\text{ L / 100 km}_{combined} &= {13.2\text{ L / 100 km}\times20\%\\+9.7\text{ L / 100 km}\times80\%}\\
&= 10.4 \text{ L / 100 km}
\end{align}
The Kia has a 80 L fuel tank.
\[\text{km}_{total}=\frac{80 \text{ L}}{10.4\text{ L / 100 km}}=769\text{ km}\]
We can travel 769 km between fill-ups which is a 117 km more than the greatest distance we plan on driving in a single day. The estimated distance we will travel on our longest travel day is 652 km.
Therefore we can safely just fill up once per day.
[mathjax]