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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!

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