Used petrol, diesel, hybrid or electric? Here’s the drivetrain that actually suits your life

Choosing a used car used to be simple. You bought petrol if you were ordinary, diesel if you towed, and a hybrid if you liked the idea of saving fuel without learning how to operate a public charger like it was a space station. Now there are mild hybrids, full hybrids, plug-in hybrids and battery-electric cars, all promising to save you money, the planet, or both, which is a lot to ask from a second-hand machine with tyres.

The trick is to stop asking which drivetrain is “best” in the abstract. That’s marketing confetti. The real question is brutally practical: where do you drive, where do you park, how often do you tow or travel, and do you want your next car to be a sensible appliance or a rolling science project with a charging cable attached?

How each drivetrain actually differs

Let’s start with the bit the brochures usually make sound more magical than it is. A petrol or diesel car burns fuel and does all the work itself. A mild hybrid adds a small electric assist to help the engine coast, stop-start and accelerate a bit more cleanly, but it is still fundamentally an engine-led car. A conventional hybrid goes further, using a larger battery and electric motor to do more of the low-speed grunt work. A plug-in hybrid, or PHEV, takes that idea and stuffs in a much bigger battery so it can cover short trips on electricity alone before the engine steps in. A battery-electric vehicle, or EV, skips the engine entirely and runs on electricity only.

That broad ladder matters because it shapes everything else, from fuel use to servicing to where the car can realistically live. The supplied evidence supports the basic distinction between petrol, diesel, PHEV and EV drivetrains, and the general running-cost differences between them. It does not support turning this into a fairy tale about one technology winning forever. Cars are not ideology in a shirt. They are transport, and transport is supposed to fit your life instead of bullying it.

• Petrol and diesel: simplest familiar layout, but still reliant on fuel and regular engine servicing.
• Hybrid: uses electric assistance to trim fuel use without demanding charger discipline.
• PHEV: can do short electric-only trips if charged, then behaves like a conventional car once the battery is low.
• EV: no fuel tank, no tailpipe, but charging access becomes part of ownership.

If you can charge at home, the argument changes

EVs become much more attractive when charging is easy. That is not a niche footnote. It is the whole bloody roof beam. The evidence supplied supports the basic point that EVs need charging and generally have lower routine servicing needs than petrol and diesel cars. That sounds lovely, because it is lovely, but only if you can reliably feed the thing electricity at home, at work or somewhere convenient enough that your life does not become a scavenger hunt for plugs.

For a PHEV, home charging still matters, because otherwise you lug around a larger, heavier battery and a second powertrain without getting the full benefit. In other words, you can absolutely buy a plug-in hybrid and never plug it in, just as you can buy running shoes and use them to carry groceries. Technically allowed. Questionable in spirit. A standard hybrid is less needy, because it does not depend on a charger to work properly, which is why it often suits buyers who want lower fuel use without adding charging anxiety to the weekly routine.

Servicing and complexity are not the same thing

One reason EVs look tempting on paper is that they have fewer moving parts in the drivetrain than a conventional petrol or diesel car. The supplied evidence supports the general point that routine servicing is typically lower for EVs than for internal combustion cars. Fewer oil changes, fewer exhaust bits, fewer mechanical dramas pretending to be “character”. That part is straightforward.

But complexity does not vanish, it just moves. Hybrids and PHEVs combine combustion and electric systems, which can make them more mechanically and electronically involved than a plain petrol hatchback. That does not make them bad. It makes them more complicated. There is a difference, and it matters when you are buying second-hand. If you want the least conceptually intimidating ownership experience, a petrol car still has a certain blunt charm. It is the ute of drivetrains: not elegant, but you know what it is doing.

• EVs often have lower routine servicing needs than petrol or diesel cars.
• Hybrids and PHEVs may save fuel, but they also add drivetrain complexity.
• Plain petrol cars remain mechanically familiar and easy for many workshops to understand.

Used EVs are cheaper for a reason, and batteries are the reason

The used-EV proposition is seductive: someone else has already swallowed the worst of the depreciation, so you may be able to buy into electric motoring for less than new-car pricing would suggest. That is the promise. The caution is that the battery is the heart, lungs and temper of the thing. The research brief supplied for this article specifically flags battery condition and charge-cycle history as important used-EV considerations, but the independent excerpts provided do not verify detailed battery-testing claims. So the sensible line is simple: battery health matters, and you should treat any used EV with the same suspicion you would give a smoked-out fridge that claims to be “working perfectly”.

The same caution applies to support and parts access. The brief notes that some brands have stronger Australian support, parts supply and warranty backing than others, but the supplied sources do not let us name winners and losers without guessing. And guessing with a car budget is how people end up doing interpretive dance around service delays. If you are looking at a used EV, check what local support looks like, what warranty remains, and whether the brand has a decent service footprint where you live.

• Used EV pricing can be tempting because some depreciation has already been absorbed.
• Battery condition is central to used-EV value, even if the supplied evidence does not quantify how to test it.
• Brand support and parts access matter more with newer EV brands than many buyers first assume.

Why hybrids keep hanging around

Hybrids keep making sense because they are the middle ground that is not actually cowardly, despite what the internet occasionally suggests. They can be especially useful for buyers who do lots of urban or mixed driving, want better fuel economy, and do not want to organise their life around a charger. The supplied evidence supports the broad running-cost advantage of hybrids compared with more conventional petrol and diesel vehicles, though it does not provide detailed Australian cost calculations in the excerpted material.

PHEVs are the wild card. They make the most sense when your daily driving is short enough that you can exploit the battery regularly, but your longer trips still need engine backup. That is a useful niche, not a universal answer. If your local commute is short and charging is easy, a PHEV can be brilliant. If you never charge it, it becomes a very heavy hybrid with a moustache and an identity crisis. Not ideal.

• Standard hybrids suit buyers who want better fuel economy without charging dependence.
• PHEVs suit short daily trips plus occasional longer runs, if you will actually charge them.
• Hybrids can be a practical compromise where EV charging is inconvenient or unavailable.

Towing, range and the reality check nobody wants

Towing is where enthusiasm meets physics and loses. The research brief notes towing range as a practical consideration, and while the supplied excerpts do not give detailed model-by-model figures, the general issue is obvious. EV range drops under heavy load, PHEVs still rely on battery and engine management, and diesel remains the old-school choice for buyers who do a lot of towing or long-distance work. That does not make diesel trendy. It just means torque, range and refuelling speed still matter when you are hauling a trailer rather than a shopping bag.

This is also why there is no single “best used car” fuel type. A city commuter, a country traveller, a family with no driveway charger and a buyer who tows a van once a month are living in completely different motoring universes. The industry loves to sell them the same cheerful answer. It is rubbish, of course. The right answer is the one that matches the boring details of your week, not the glossy fantasy in the showroom.

• Diesel still has a role for heavier towing and long-distance use.
• EV range and towing practicality depend heavily on load and charging access.
• The best drivetrain is the one that fits your actual usage, not your self-image.

So what should you buy?

If you have easy charging at home and mostly drive short to medium distances, a used EV is worth serious attention, provided the battery condition, support network and remaining warranty all stack up. If you want fuel savings but do not want to think about chargers much, a standard hybrid is the sane, low-drama choice. If your days are short and predictable but you still want engine backup for longer trips, a PHEV can work very well, as long as you will plug it in. If you tow, travel long distances often, or simply want maximum familiarity, petrol or diesel still make a respectable case for themselves.

The broad message from the evidence is not that one drivetrain has won. It is that ownership economics are shaped by charging access, servicing expectations, battery condition, support and how you actually use the car. That is less glamorous than a product launch, but vastly more useful. Cars are supposed to reduce friction in your life, not add a new admin department. Choose accordingly.

Zachary Skinner

Zachary Skinner is the editor of TechDrivePlay.com, where tech, cars and adventure share the fast lane.
A former snowboarding pro and programmer, he brings both creative flair and technical know-how to his reviews. From high-performance cars to clever gadgets, he explores how innovation shapes the way we move, connect and live.