Petrol, Diesel, Hybrid or Electric: Which Used Car Is Right for You?

The right fuel type depends on one question more than any other: what does your average week of driving actually look like? Answer that honestly and the decision mostly makes itself. Here's the honest picture for used buyers in 2026.

Petrol: the safe default

For most UK drivers doing a mixed 6,000–12,000 miles a year, a modern petrol car remains the lowest-risk choice. Petrols are cheaper to buy than their diesel equivalents used, cheaper to fix, happy with short journeys, and every petrol sold since 2006 (Euro 4) is ULEZ compliant — so city clean air zones are a non-issue.

Choose petrol if: you do average mileage, mostly local and mixed driving, and want minimum fuss.

Avoid if: you tow heavy loads or regularly drive 20,000+ motorway miles a year — a diesel will be noticeably cheaper to run.

Diesel: still right for the right driver

Diesel's reputation has taken a battering, but the economics haven't changed: a good diesel does 15–25% better fuel economy than the equivalent petrol, with effortless mid-range pull that makes motorways and towing easy. The catch is that modern diesels need regular long runs. The DPF (particulate filter) cleans itself at sustained motorway speeds; a diesel used only for short town trips will clog its DPF and present you with a four-figure bill.

ULEZ note: only diesels meeting Euro 6 (roughly September 2015 onwards) escape London's ULEZ charge and similar zones in Birmingham, Bristol and elsewhere. Check the specific car before buying.

Choose diesel if: you do high annual mileage with regular motorway runs, or you tow.

Avoid if: your driving is mostly short urban trips — you'll have DPF trouble and you'd barely benefit from the economy anyway.

Hybrid: town driving's best friend

Self-charging hybrids (think Toyota and Lexus) pair a petrol engine with a small battery that harvests braking energy. In stop-start traffic they're superb — 50–60mpg in town is realistic — and there's nothing to plug in. They're also proving exceptionally reliable; the taxi trade runs Toyota hybrids to 300,000 miles.

Plug-in hybrids (PHEVs) add a bigger battery and 20–50 miles of electric range. They make sense only if you can charge at home and your daily driving fits inside the electric range — do that and you'll rarely burn petrol. Buy one you can't charge and you're carrying a heavy battery around for nothing, with worse economy than a plain petrol.

Choose hybrid if: lots of town driving, no home charging (self-charging), or short commute plus home charging (PHEV).

Electric: cheapest to run, if it fits your life

Used EV prices have fallen to genuinely tempting levels, and running costs are unbeatable if you can charge at home overnight — often 3–5p per mile against 12–18p for petrol. Servicing is minimal (no oil, no clutch, regenerative braking spares the pads), road tax is low, and city zones are free.

The honest caveats: public rapid charging is far more expensive than home charging and still patchy in places; real-world range drops noticeably in winter; and you should always check a used EV's battery health report before buying — degradation varies with how the car was charged and used.

Choose electric if: you have off-street parking with home charging and your typical daily mileage is well inside the car's real range.

Avoid if: you can't charge at home or regularly do long unplanned journeys.

The 30-second decision guide

Still unsure? Tell us how you actually drive and we'll give you a straight answer — even if it means talking you out of the car you came in for. It's better than selling you the wrong one.