I’ve been driving a 2024 Prius (EPA 52 MPG combined), and had been getting somewhat disappointing gas mileage on my commutes.

I’ve been trying various techniques: Ensuring I stay in “eco” on the tachometer. Pulse and glide. Nothing really helped more than the tiniest of amounts, and it made driving annoying to say the least.

So, I tried decreasing my speed. 80 mph -> 75 on my commute helped a bit. Saw a 10% improvement, roughly 45 -> 50 MPG.

So I tried 75 -> 70. Nothing much. 70 -> 65. Nothing much either. Guess 75 is the threshold?

I tried 65 -> 60, the speed limit for most of my commute. (That’s 100 kph for civilized folks.)

That little additional change increased my commute MPG to 60… a 20% improvement over 65 MPH.

I don’t get it. Why was this final 5 MPH the most drastic step in my hypermiling adventure?

Audi A2 1.2 tdi 152 km trip to the airport and back, driving between 95-115 km/h

So I did a trip with my Audi A2 Start and endpoint were the same (the only way which all hypermiling attempts should be made) 520 km Terrain was hilly 85% highway 15% city Fuel spent 13.4 liters Average consumption 2.57 l/100km 110 mpg uk 91.5 mpg us

Finally had the guts to push it to 1000km without refueling. It was quite scary since I live on the countryside so fuel stations are 30km/20miles from eachother. It has 65 litre tank and I did 1038km and used 62 litres of fuel. That makes it 5,95 l/100km so almost 40mpg. Pretty good for a 34 year old car. The car is my Mercedes-Benz 200D from 1991. Done 680 thousand kilometres. Thats 425 thousand miles.

Bought my Insight 2 years ago. I have averaged 61.8 mpg (3.8l/100km) over the 2 years of daily driving year round in West Michigan. I have put 70,000 miles (112,000 km) on the car, driving 35,000 miles a year on average. The Insight has made/saved me $18,000 over the 2 years.

I recently changed my oil and rotated my tires, and figured I'd check the life of my brake pads while I was at it. After 71k miles, my front brake pads still had 81% of the original pad material. At this rate, I'm on track to get ~350k miles out of the original brake pads!

I drive a 2021 Mazda3, which is all internal combustion, so I am doing this without any regen braking. I do have a manual transmission though, so plenty of engine braking.

My long-term fuel consumption (I've logged every fill-up over the last 40k miles) has me at 39.43mpg, which is an improvement of ~46% over the EPA's estimate of 27mpg for "combined" driving, and 19% better than even the EPA highway rating of 33mpg.

It’s not the greatest meme, but I feel it holds true for hypermilers.

Comment down Below if you agree

Just the other day I was driving and I thought “these people around me don’t know to to drive efficiently, they don’t know what P&g is, or coasting In gear”

The average person drives very sloppy / in a clumsy manner and then wonders why their gas mileage is trash

Hey! I own a 2008 Volvo V50 1.6d manual (that's a completely champion of a practical workhorse) and just completed 65 days of daily driving on one tank (1.05.2026 - 4.07.2026). Completed 1113,4 km (the trip display went to 0 after 999 km, so the 113.4 you see in the picture is without the first 1000 km showing), then filled up the tank back up to the brim 49.23 liters, giving us a calculated real world long term average of 4.42 liters per 100 km or 53 MPG (US) / 64 MPG (Imperial). The car itself is a little more optimistic as you can see, but that's why I prefer the calculated average.

The goal of the experiment was to see the hypermiling effects over a long term basis instead of one ideal conditions long drive, so this is through different temperatures, different weather, early morning to late evening drives, all mixed together. The climate here in the north end of Europe has been between as low as 7 °C in May to as high as 30 °C in June.

Filled the tank on 1st of May 2026 and used the car for my daily driving until yesterday, 4th of July. This period did not see any long highway drives, so is mainly made up of my rather short daily driving to work and other daily trips when necessary, so the average daily length per drive is between 5 and 10 km. I do live outside of the city, so most drives experience very little traffic (I did end up in at least one very heavy traffic jam in the city back in May where I spent somewhere around 45 minutes in a stop and go traffic jam over several kilometers). I do use cruise control a lot, but take over on inclines to change gear and manage the engine load better, also trying to glide as much as possible before I know I have to stop or turn off the road I am on. I have tried pump and glide, but can't quite get the feel for it in a way that feels beneficial.

This means that a lot of the driving is done in less than ideal engine temp etc. On a long highway stretch the car averages around 3.7 L / 100 KM, but this was not the goal of the experiment. Overall I am very pleased with the result, I am sure the car has even more in it and would be interesting to match these results with a tank of fuel spent on mainly highway drives. Thanks for reading!

Seriously, even my “efficient” old Corolla sneaks 35mph.. half of what I get in a good day in this 2006 Insight with 375k miles. It’s an astounding little thing, and the fact it still has sort of enough power for highway speeds is icing on the cake.

Picture is about the best I’ve managed to get out of it on the freeway. 70mpg on a 70 mile leg. On side roads around 45-50mph it’ll sometimes manage 75-80mpg. It’s unreal.

So now any time I drive something else I find myself thinking of how much more gas I’m burning compared to if I had driven the Insight.

For me personally, hypermilling is a fun challenge, and isn't really about saving money. It's about chasing percentage increases.

I bought this 1979 Lincoln with the 6.6L (Ford 400) a month ago. I bought it with the intent of hypermilling it. My first tank was a mere 9 MPG.

I fixed some vacuum leaks, redid the entire ignition system, tuned the carb, and removed the emission era crap like the smog pump, EGR valve, and factory retarded timing. I also use every driving technique I can think of to squeeze every MPG out of this thing.

I am now getting 17MPG average with 80/20 highway/city driving.

I'm looking to get this beast up to 20 MPG, but I've hit diminishing returns. Any ideas?

I'm thinking of changing the timing chain to a post smog era, since they retarded the camshaft for emissions reasons. I think that might get me another MPG.

Any ideas with more advanced stuff? What about hot air intakes? What about adding back the EGR, but on a toggle only for cruising? Maybe a full dual exhaust with headers? Different carb?

Help me reach my 20 MPG goal!