What is the most fuel-efficient speed in KM?

Okay, so, what's the real sweet spot for saving fuel, you know? Like, what speed should I actually be aiming for? Well, from my own driving and just chatting with people, it seems like somewhere between 45 and 80 km/hr is supposed to be the most fuel-efficient.

Now, let's be real, that sounds incredibly slow on the highway! Can you imagine? But honestly, it kind of makes sense when you think about it. A friend of mine, Mark, he was telling me the other day that pushing his car to 110 km/hr instead of just chilling at 100 km/hr guzzles something like 15% more fuel. 15%! Seriously? That's crazy! I mean, is saving a few minutes really worth that much extra gas money?

For me, definitely not. I'd much rather take a few extra minutes, crank up the tunes, and save some cash. I mean, fuel efficiency is kind of a big deal to me, especially with gas prices these days! Plus, let's be honest, who needs the stress of speeding anyway? A little slower and a little cheaper? Sounds good to me!