Consider the following figures:

Trip Time: 3 hours
Trip Distance: 135km

So by simple math, ang average speed is 45kph for the entire trip.

What would yield better fuel economy:

1) Doing 45kph consistently for the entire 3 hours

OR

2) Doing a mix of 10kph for 30 mins then 80kph for 30 mins alternately for 3 hours?

Just asking because I wanted to know how scenario 2 affects my fuel economy.

Kasi I went on a trip from Pasig to Nuvali and back last Saturday, which yielded the following figures:

Trip Time = 3:54
Trip Dist = 92.1 km
Ave Speed = 23.62 kph
Fuel Cons = 13.33 km/L
Car = 2012 Kia Rio 1.4 EX AT Sedan

Considering nag-SLEX ako hitting 100kph at times, mabagal pa din yung average speed because of the very heavy traffic in the Pasig area + moderate traffic in Sta Rosa.