Why Not to Buy a Diesel Car (Diesel vs Gasoline Engine)

Why Not to Buy a Diesel Car (Diesel vs Gasoline Engine)


rev up your engines! today I’m going to talk about diesel versus
gasoline engines in your car, now in the United States, diesel engines
generally have been used with big diesel trucks for quite a few reasons, they put
on a tremendous amount of torque, so they’re great for pulling things and
when they’re added with the turbocharger, it’s got even more torque for pulling
things cross-country, up mountains, and for carrying really heavy loads, like
tons of cement, they’re made for hauling stuff, as an example, I once rented a
u-haul truck for moving stuff, it was a gasoline truck and it used tons of
gasoline, on a 30-mile trip it used almost 10 gallons of gasoline, so the
next time I rented a diesel truck and the same trip only used about three
gallons of gasoline, they’re much more fuel efficient when they’re carrying
heavy loads, and quite a few of my customers have diesel pickup trucks,
because they do a lot of towing and hauling and it works better for them, now
diesel engines have much more pressure inside them, often more than twice than a
gasoline engine, so they cost more money to make and
they’re more heavier, so it does take more energy to move themselves along, and
since they don’t have spark plugs, they don’t need an ignition system,
they’re simpler to maintain but when they do break down, they can often cost a
small fortune to repair, and with the advancement of gasoline engines and
metallurgy, the gasoline engines nowadays if you maintain them, generally lasts
just as long as a diesel engine does, now I’ve been working on cars of trucks
for the last 50 years, and decades ago, the customers of mine that actually had
diesel cars, did so for two main reasons, one, they got much better fuel economy than
the gasoline engines got, and two, the diesel fuel costs a lot less than the
gasoline used to, but time marches on, today diesel actually cost more than
gasoline, I just priced it out here in Houston, and
a gallon of regular gasoline was two dollars and 37 cents, where a gallon of
diesel was three dollars and three cents, the price difference has more to do with
capitalism than anything else, when you get a barrel of crude oil you can get 20
gallons of gasoline out of it, but only 11 of diesel, since there is
less diesel, they say it’s more of a rare commodity and they charge more for it,
now when I was a kid, diesel was a lot cheaper, diesel is cheaper to refine than,
gasoline it’s a lower grade product, but even then they’re charging more for it
now, and as modern gasoline cars get more sophisticated with variable valve timing,
and very complex fuel injection systems, they can get just about the same fuel
mileage as a diesel car can, and one big difference between gasoline and diesel
are, the gasoline cars put on a lot less pollution, because diesel engines don’t
have an ignition system, they use higher compression pressures inside, to self
ignite the diesel fuel, so there’s always some type of incomplete combustion, and
they throw out more pollutants, now as you can see in this picture, there are
ways to decrease the pollution coming out of Diesel’s, they use diesel
particular filters, then they use a special urea type liquid that’s injected
to make them pollute less, but that’s complicated, gives it more maintenance,
and I’ve seen these systems clog up and cause all kinds of problems, so when you
take all this into consideration, it’s no wonder that less than 2 percent of the
passenger vehicles driven the United States are diesel vehicles, so now you
know a little bit more about diesel versus gasoline engines, and why the
United States has always seen diesel cars as kind of a fringe thing, more quick fixes
on the Scotty Kilmer Channel, so if you never want to miss another one
of my new car repair videos, remember to ring that Bell!

About the Author: Michael Flood

100 Comments

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  2. Clearly this man has never owned a diesel 😂 diesels are more fuel efficient, tons more torque, cheaper than premium which is like every car now, easier to tune and increase power, way better longevity… and the list goes on! 😂

  3. It depends.. i have a diesel car before, hyundai accent crdi 1.5 ,my fuel millege is 18 to 25km/pr liter, and its fast too, top speed 200kph.. it depend what country your in..

  4. European governments told us to buy diesels to save the environment even though diesels are far more polluting and have helped bring 100s of thousands of Europeans to an early grave. Apparently carbon dioxide is a toxic gas according to our esteemed scientists and nox and other particulate matter that get wedged in our lungs from unburnt diesel is perfectly safe.

  5. The best car I every owned is my current daily driver a 1981 Mercedes-Benz 240 diesel with a 4 speed manual transmission.

  6. Scotty, my first car was a w123 Merc. Due to nostalgia I wanna buy one again, they are going for relatively cheap around where I live. My question is; should I go for a diesel or petrol?

  7. for the love of god stop buying diesel vehicles , if you ever ridden a motorbike behind a diesel vehicle u know what i am on about , just don't buy it go petrol it smells nice

  8. 2015 Jeep Grand Cherokee Ecodiesel 4×4. 135k miles with regular maintenance and only 1 minor recall that has been resolved. No stress. No hassle. No problems 🤷🏽‍♂️

  9. Door from a diesel just falls in the road and a little off the road it just makes the road a little bit waxy

  10. Not to mention all the people who turn off the advanced emissions on diesel engines over here in the states.

  11. europe: short travel much more diesel engines. usa: longer travel but only gasoline engines. world is strange,

  12. 16% tax on diesel, UK its close to 60-70% tax. i wish fuel in UK was a cheap as some parts of the USA

  13. Scotty,,, what about converting Diesel to be able to run on cooking oil,,,??? Please answer,,,!!!

  14. buddy you should drive a European Diesel (mostly German) car, and than you will see how efficient and fast they are!

  15. In Europe(i'm in portugal-that small place to the left of spain where the …S L O W… INjustice system ain't worth a dime- avoid) it's the opposite : a diesel car will cost you almost HALF to feed, as a gasoline one; diesel is cheaper(1.30 -1.40 euro/liter) than gas (1.55 to 1.65) AND DI diesels,around 90 hp,( almost all 1.5 DCIs and other Is) routinely get 4 to 5 l/100 Kms (59 to 47 MPG US); i get 3.5 l/100 kms (67 MPG) easily if i drive at or below 65 mph; like i said, a gasoline car costs almost twice as much to feed here; i lent a diesel car (1.5 dci-2004-180000 kms)to one of my daughters over a year ago, and she is not giving it back yet, she says she is saving a lot of money on gas lol

  16. I ll stick with diesel, Audi 1.9tdi drives forever ! Gas 200 000+ kms and starts the big time expensive repairs 400 000km on well looked after diesel, is only just breaking in, plus better fuel economy

  17. Scotty…why are most cars in Europe Diesel engines? There must be a great advantage if diesel cars are most commonly used all across Europe, not just fuel economy, but reliability also…

  18. NA Gasoline Engines have zero torque at low rpm………….Only Diesels can provide that……………A GDI Engine on the other hand does provide low end torque……….but then the fuel efficiency goes for a toss………….Only Diesels Engines can provide good fuel economy and low end torque as a package…………..A GDI drinks too much fuel to provide that same torque as a Diesel does………..

  19. I totally disagree, i have a corolla 1,4 d4d and is one best cars ever. Runs good and is very economical, but it's best feature is that i can climb a steep section of the highway with 100 miles per hour, while getting mileage that nothing.

  20. It’s all about more money to corrupt for your government. Here in the Philippines, diesel is still cheaper than gas

  21. I had a diesel Hyundai i30 – had it for 7 years and I only replaced it as I was involved in an accident. It was a 2010 model so no DPF filter. It was the best purchase I made, Smooth, heaps of torque, great fuel economy and never had an issue with the engine. – most of my driving was city driving also.

  22. diesel is cheaper in India than petrol. but India govt plans to get rid of diesel based passenger vehicles in coming years.

  23. You have less confidence in diesel engines because US made diesels are CRAP! Europe has been running diesel cars on a mass scale for decades and reliably. If you run a diesel engine on slow, start stop driving the engine is not working efficiently as DPFs won't get up to temperature and the urea systems reduce NOX massively and CO2 levels in diesels are lower than gas engines. In Europe people can commute distances where the diesel is running longer at speed which let's the engine work efficiently. Diesel in Europe is cheaper than gas in most countries by up-to 10c a litre but it's more expensive in The UK because the government raised the price in the 90s because more people started buying diesel cars to keep revenue coming in. I drive a truck "semi" and on trips to The US and Canada I've looked at your trucks and driven them and compared to European trucks they are utter junk! We run at higher weights than over there 40 to 46 tons in general transport and a few manufacturers make trucks capable of running at 250 tons, Mercedes, M A N, Scania and Volvo. Don't knock diesels, you just have ALOT of catching up to do.

  24. Scotty, your country steals gas from other countries so you have cheap petrol… the rest of us drive diesel cars 😉

  25. Scotty I agree with a lot of what you say but many times you don't know what you're saying about diesels. As far as the refining process goes you get more gallons of diesel out of a barrel of petroleum than you do gasoline because diesel is a light oil. It does not have to be refined as far as gasoline.

  26. I’d much rather have a diesel than a gasoline but they don’t make them in all the cars I want.

  27. Scotty, it is true in the U.S. but here in Portugal, it's a lot cheaper to run a Diesel car, it's 25% less expensive a it gives more mpg

  28. I love Scotty but this is the one thing i disagree with diesel cars are much better more mileage, less maintenance, bigger and better engines, cheaper to buy gas and they haul more a$$

  29. Gasoline is still far away from diesel's efficiency. When they come close it is at the expense of making an engine that will not last forever like a diesel does.
    As for pollution recent diesel engines are quite clean and emit less CO2 per km in the long run (manufacturing a diesel engine will emit more CO2 than manufacturing a similar power gasoline engine… therefore only in the long run). So I would argue they are still less evil for the environment than gasoline engines.

  30. If fossil fuel gone from earth….diesel still have alternative fuel like castor seed or crude palm oil as bio diesel

  31. I believe that European car manufacturers have better technology to produce far greater cars than we currently do in USA , therefore, the government has taken actions to help increase the price of diesel at the pumps to protect the national automotive industry, as oppose to let the consumer buy better more efficient cars produced in Europe

  32. @scotty can you make a vid advising the public on the post-scandal TDIs that are being resold by dealers? Good value or stay away?

  33. I love my diesel car. I love diesel trucks. Gasoline is for poor losers who can’t fix their own vehicles.

  34. Scotty should check out any VW TDI forum and he will see how wrong he is on many points. Just because diesel is not popular does not mean anything about how well it works.

  35. This year, we bought our first diesel car, a 2017 Jaguar. We bought used with 12k miles on it. 4 door sedan, all leather, stylish like all get out. It gets 44 mpg and had all the torque you would want. We absolutely love it. It cost what our Hyundai Sonata 4 cylinder did 3 years ago that itself was a good car, but not as good as this Jag. Its too bad VW got out of the diesel business after their cheating heart ways, because diesels are the way to go for mpg and longevity. Ask a trucker. I would never go back to gas. Oh, the diesel exhaust fluid. I refill it myself and it takes maybe 8 minutes every 6 months. No big issue here. Love the diesel.

  36. I must scrap my 30 year old 190d Mercedes with well over 300000 miles on the original drivetrain because this guy says so 😂😂

  37. buy a gasoline engine and come back after 150000km to buy a new one dont buy something that lasts its bad for the economy!

  38. Both mine are 10 year old diesel motors. Honda CRV and Seat Ibiza estate here in UK. Only reason diesel costs more now compared to 10 years ago is the government added more tax to it. They both do about the same MPG compared to equivalent age petrol vehicle. Im sure they both need the oil changed slightly more often. In fact the Seat seems very prone to poor running if the oil is not changed because its recirculating air from inside the engine into the air intake. Seat is on its 3rd DPF pressure sensor.

  39. Diesel in Boston today priced same as 89 and SUV gets 28-30mpg with 400lbs of torque. All my previous previous cars use 93 and were about 20-24mpg

  40. Thumbs down votes must be from those stuck with a diesel car>>
    Trucks? That's a entirely different need…100% justified…Which Scotty noted.

    Diesel car buyers were poor researchers or dupes, who thought they would save on fuel costs due to higher MPG
    Then got really, really angry when they discovered that diesel fuel costs more
    …..often costs so much more, that it's more expensive to drive a diesel car, than a gasoline car.

    Exception to Diesel car's worthlessness in the USA
    … if the engine lasts forever, like my uncle's 240D.. with a stick :)….Diesel could be a good car.
    VW Diesels, and all VW and Audi products in the USA….garbage….never again, money pits past 50K miles

  41. Scotty go back to tech school! yeh, just read all the comments in favor of their diesel cars. 
    Scotty is so out of touch with modern mechanics. In Europe they are now equally as clean as gasoline. then again what you expect from someone who still thinks Toyotas are great cars. you know the company that hid uncontrollable speed and inability to stop.

  42. Scotty has actually made a v. good point… because in the UK and in Europe post VW diesel gate.. where US citizens have been fully reimbursed by VW falsely non polluting diesel cars.. we in Europe have not been compensated and unlikely to be, instead our governments who promoted diesel vehicles because of their low CO2 are now charging citizens or will be in the next few years thousands of dollars per year to drive old diesel in effect making them worth nothing because of the un economical cost of keeping them on the roads in towns and cities…. A lot of people don't know this because of deliberate poor communication by the government.. however they will realise that they have no choice but to sell or scrap diesel cars that may be only 5 years old…shocking but true.. Google low emission zone in European cities..

  43. Just for the record… The thermodynamic efficiency for diesel engines is 50% versus 35% for gasoline engines. That means that the diesel engine is 42% more efficient than a gasoline engine at much higher power levels. Of the 19-20 gallons of gasoline produced from a 42 gallon barrel of oil only 7 gallons are converted to mechanical energy to propel the car and 13 gallons are lost as waste heat to the environment! Thats a tremendous waste of energy! A 42 gallon barrel of crude oil produces 11-12 gallons of diesel fuel. That means that 6 gallons is converted to mechanical energy to propel the vehicle and 6 gallons are lost as waste heat. Diesel fuel is separated from crude oil via distillation which is very low cost when compared to the high cost of making gasoline via cat cracker. When comparing vehicles powered by gasoline and diesel engines the diesel engine always gets much better fuel economy and power.

  44. Scotty… I have to disagree with you on this I have a 2015 Audi TDI (yeah VW Diesel scam) and the reason why people don’t understand and buy Diesels in the US is due to poor understanding of how they work. It’s not a modest increase in MPG, I'm getting 38 MPG city and 55 HWY effortlessly WAY better than EPA estimates. Also these post VW scam cars have 162,000 mile warranties on the engine and exhaust system. So I was able to pick up an A3 TDi with 23000 miles on it fully loaded in perfect condition for $15,5000 with a 162,000 warranty that covers the engine. How can you beat that? So I pay 11% more per gallon but get 30-35% better mileage. And it’s a fact.. Diesels last longer !!! Also… Audi’s are more expensive to maintain… yes. But when maintained they don’t break like people think. My family has long owned Audi/VW and you just follow the recommended MX and no problems well passed 100,000 miles. I think people buy Audi’s and drive them like morons and put the wrong oil in and maintenance the car like it’s a Toyota.

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