Can You Get 100 MPG in a Gas Guzzler?

Added: 2026-05-19

[00:00:00]How many miles per gallon can you get in a gas guzzling sports car? 15, 30, 100?

[00:00:06]Today, we'll be testing a bunch of fuel saving techniques from the basic to the insane to the downright dangerous.

[00:00:14]Oh god, this is scary.

[00:00:16]We're going to show you which ones actually save you money because extreme gas prices call for extreme measures.

[00:00:22]Starting with what not to do.

[00:00:27]All right, tire pressures are sporadic.

[00:00:29]We're going to go straight into sport mode. AC will be cranked. Windows are down. Junk in the trunk. And I got a heavy right foot. Let's hit the road.

[00:00:45]God, that's so satisfying. To set a baseline, we've devised a 120 m freeway route to test our MPGs. Unlike city driving which has too many uncontrollable variables like stop lightss and traffic, this will give us a consistent realworld average to compare data as we run this route over and over.

[00:01:12]Minister society, this car, >> if you're wondering how we measure our MPGs, we topped off the tank at the beginning of the run. be filling it up again at the same pump to see how much fuel we burned.

[00:01:24]>> All right, Nolan, what do you think my MPGs were on that first run?

[00:01:29]>> Uh, okay. Mustang going 80 with a blown coyote making like 660.

[00:01:36]>> Mhm.

[00:01:37]>> I'm going to guess 12.

[00:01:39]>> 12.

[00:01:39]>> I think 12.

[00:01:40]>> You will be shocked, Nolan. I got 18 TO THE GALLON.

[00:01:44]>> WHAT?

[00:01:46]>> Kind of crazy. That is crazy. That's That's >> Yeah, modern cars are amazing.

[00:01:52]>> Yeah, they really really are. They really are.

[00:01:54]>> Even though our gas guzzler didn't quite guzzle gas as bad as we thought, we still have a long way to go if we want to hit 100 MPGs. We'll be running the same exact route several more times with our various fuel saving techniques, which brings us to level one. So, now that we've done our incompetent run with terrible air pressure, AC blasting while the windows are down, and a heavy right foot, I'm going to put the tire pressures to the proper spec so we can get a good baseline miles per gallon wise in its current setup.

[00:02:25]The science behind MPG maxing is actually pretty simple. The harder your engine works, the less efficient it is.

[00:02:31]Starting with our tire pressure.

[00:02:32]Underinflated tires have a lot more rolling resistance on the road, so the engine has to work harder to keep them moving. Inflating your tires to the correct PSI guarantees they're at peak efficiency. We're also rolling our windows up to reduce drag. When the windows are down, you're creating more air resistance that your engine has to fight against. Turning the AC off saves gas because your engine doesn't have to use the extra energy to turn the AC compressor. But the thing that will really save MPGs, not driving like a Mustang driver. All right, so I'm I am babyfooting the gas pedal right now. I don't want to rev very high. I'm trying to stay under 2,000 RPM. We are already in sixth gear at 45 mph. Oh, someone already cut me off. I had to slow down. This is not what I want. I want to remain consistent. But we're good right now.

[00:03:19]Everyone's passing.

[00:03:23]I feel like one of those people on the highway that I hate the most. There are people stuck behind me and I'm not moving. I refuse to move. I will hold strong. I am now a hindrance on the highway, but I must save money. It's pretty clear that this will not be as easy as the baseline run without AC or air coming in from the windows. Mustang is getting toasty. It is so hot in here.

[00:03:47]Oh my god, I'm sweating already.

[00:03:53]What do you think my MPGs were?

[00:03:56]>> Okay.

[00:03:57]27.

[00:03:59]>> Ooh, you're a little high. We were shocked to find out we got 24 to the gallon.

[00:04:03]>> 24. Okay. And a car like that.

[00:04:05]>> Yeah. Pretty impressive.

[00:04:07]>> That gives us a 33% increase in fuel mileage >> just from changing habits. We've done everything we can do with the car that we have in its current form. Let's kick it up a notch. Let's get a little crazy with it.

[00:04:23]Let's air bend.

[00:04:26]>> Man, this is a lot of work. Wish I had an extra set of hands.

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[00:05:06]Whoa. Getting crazy. Wa.

[00:05:12]Time to do some aerodynamics. Time to make this thing cut through the air.

[00:05:15]Unfortunately, Justin, aerodynamics pretty complicated.

[00:05:19]>> Yeah. Yeah.

[00:05:20]>> Luckily, we brought someone in who can help us in this very delicate and sophisticated field. Super fast me.

[00:05:27]You might recognize Superfast Matt from his YouTube channel, Superfast Matt, where he does a ton of amazing projects like your Streamliner Bonavville car and my favorite, the off-road Viper. What do we have here, Matt?

[00:05:38]>> Well, here we got uh computer analysis of uh aerodynamics, CFD, uh computational fluid dynamics. Everything you see here that's red is generating drag.

[00:05:46]>> So, you got up here at the front, you got pressure drag. That's sort of you stick your hand out the window, pushes back. The wheels are turnurning up a whole bunch of >> Yeah.

[00:05:53]>> whole bunch of drag there. Wheels are really bad. One really big thing you could do is do skinnier wheels front and rear.

[00:05:59]>> We got a bunch coming off the tail here.

[00:06:01]We got a lot of drag out here. So, you can get rid of that really just by making a sharp edge. You like the I think you guys have a drag.

[00:06:07]>> We actually have a drag wing. Yes.

[00:06:09]>> Yeah. So, this is creating some downforce because you got the the gurnie flap on the back there. And it probably is kicked up a little bit. If you want to just minimize drag, you want to get rid of that lip on the back. And you probably want to actually angle it down.

[00:06:19]You want the straight flat edge going back. You want that on the sides, too.

[00:06:22]So, I don't know what what these look like, but you'd want something to add to the side that comes straight down and pulls in a little bit.

[00:06:27]>> Is that why you see on like semi-truck trailers? Those >> exact make those for that car. You can probably use that.

[00:06:34]>> We have a lot of material.

[00:06:35]>> We have material. We could we can go crazy. What is this model here?

[00:06:39]>> So, here I covered up the wheels. I didn't change anything else. And that dropped us from a drag coefficient of 314 to 305. Next thing I did, same thing, but I dropped the car 30 mm. 35 mm in the front, 30 in the rear. And that pulled us from 305 to 0.295. So that helped quite a bit. So the last thing I did, >> that's so sick.

[00:07:00]>> This might be a little more extreme than you want, but it's a significant drop.

[00:07:03]>> That's pretty cool.

[00:07:04]>> This goes from 295 to uh 242 >> Prius territory.

[00:07:08]>> Yeah. So you're getting really good here. One thing I didn't do, but you might try that I do on my race car >> Mhm.

[00:07:14]>> is make it jagged.

[00:07:16]>> It uh just helps the flow detach. You'll see it on airplanes next time you look out a window. a lot of airplanes on the cowl of the engine. It'll be jagged.

[00:07:23]>> Yeah. If you want to check out the arrow results that we have here on Air Shaper for yourself, we have a link down in the description. I'm I'm excited to get working on this thing. So, let's do it.

[00:07:30]>> Let's do it.

[00:07:31]>> Using Matt's wind tunnel data, we now have a plan to modify the car and fix the aerodynamic trouble spots.

[00:07:38]>> And we'll have the coolest Mustang ever devised.

[00:07:43]>> The smoothest Mustang. Also, something we forgot to mention. We added like 300 lb to the trunk earlier to account for all the carbon fiber on our Mustang.

[00:07:52]We're going to take it out. Next, we're going to address the drag at the front of the car. Nice flat surface here.

[00:07:58]Limit the amount of air.

[00:08:01]All right. So, here are our new rear tires. These are actually the front drag skinnies off of low Mustang replacing our stock size Mustang wheels and tires here. I do not recommend you do this because you're not supposed to drive on the highway with rag skinnies on the front. Definitely not on the rear.

[00:08:22]Dude, this is sick.

[00:08:23]>> All right, so before we throw our front skinnies on, we're actually going to lower the front suspension.

[00:08:33]Good to go.

[00:08:41]Besides the skinnier wheels, we're also adding covers over the spokes to minimize the turbulence that Matt mentioned.

[00:08:50]>> What do you think, Nolan? How are you going to get the wheel on?

[00:08:59]>> Oh, yeah. This might be the next wave, dude. When gas is uh $13 a gallon, everybody's going to want to do this.

[00:09:06]Oh, and now the last piece of the puzzle, a glorious giant rear fairing.

[00:09:24]That's it. We did it in one day. In one day.

[00:09:37]And we're back at pump number nine, Santa Clarita Grapevine. Time to do a baseline with our modifications to see how many MPGons we actually gain.

[00:09:51]Once again, we're running the same 120 m route. This time, we'll see if Aeromods alone are enough to boost our MPGs.

[00:10:06]We're doing pretty damn good. We got to hit 30 though.

[00:10:21]>> All right, moment of truth.

[00:10:23]>> So, 4.428 428 gallons on that same route gives us 27.1 MPGs.

[00:10:33]>> Oh, 3 MPGs might not sound like much, but for the average American, that's a cost savings of around $300 per year. And compared to our original test, that's over $1,000 in savings. But let's be honest, 27 MPGs still isn't good enough.

[00:10:50]What if we could engineer the perfect situation to actually get 100 m per gallon? For our final fuel saving technique, we're going to try drafting.

[00:11:03]>> All right, Justin, you ready?

[00:11:04]>> I'm ready. Seal us up, Max.

[00:11:06]>> The idea is simple. The truck punches a hole through the air, nearly eliminating the high pressure drag in front of you.

[00:11:15]This is a real technique that NASCAR drivers use to save fuel and drive faster. The only problem, you have to get dangerously close for this to even work. Oh my god.

[00:11:26]Okay, we're at 13 18 m per gallon.

[00:11:30]38 42 61 61 76 >> 19 Oh, I'm on the throttle.

[00:11:39]>> Oh, Jesus Christ. 47. I'm trying not to look at the truck. Try not to look at the truck.

[00:11:46]>> Begin to slow down.

[00:11:47]>> Good god, that was a little hairy, dude.

[00:11:50]That was hairy. Justin, we're going to run back.

[00:11:52]>> Yeah, we tried a decent speed at at 50.

[00:11:56]Let's go faster.

[00:11:58]>> Yeah, why not? Let's cut that wind even more.

[00:12:00]>> Let's do it. Oh, I've been cutting wind all day, buddy.

[00:12:02]>> Oh, that's what that was.

[00:12:10]>> Okay, at 55. Yeah. 55.

[00:12:14]All right.

[00:12:14]>> 37 45 >> Oh, Jesus. 50 54 56.

[00:12:24]All right. We hit like 56 at the highest on that one, I think.

[00:12:28]>> Copy that.

[00:12:28]>> Should we head back to base?

[00:12:30]>> Let's do it one more time. Let's just try like 40 miles hour and see if we can get there >> one last ride. 40 miles an hour downhill with a U-Haul protecting us from the headwind. This should be it.

[00:12:45]Not looking at the truck. Not looking at the truck. I'm ignoring the truck.

[00:12:51]I'm guessing at this point. You are so close.

[00:12:56]55. Okay. 65.

[00:13:00]Jesus Christ. I can't get any closer.

[00:13:07]99. Oh, I saw it. I saw it. Huh?

[00:13:10]>> I saw 99.6. We did it. And we didn't crash. Yes.

[00:13:19]>> So, can you get 100 m per gallon in a 600 plus horsepower Mustang? Yes, but you have to be going downhill at 40 mph with a rented U-Haul truck in front of you, negating all gas savings that you may have made. Thank you guys for watching. Check out this video we have on screen. Save a little money. Drive a little slower.

[00:13:39]Keep your supercharger though.

[00:13:41]>> Yeah.