Usually a diesel deserves extra scrutiny if most of your driving is short, low-speed trips. Modern diesel emissions systems generally benefit from regular suitable running conditions.
Buy for your usual journeys
A diesel that makes sense for frequent long motorway journeys may be a bad fit for repeated two-mile trips. Potential fuel savings need to be weighed against system complexity and how the car will actually be used.
Used-car history matters
If buying a used diesel, ask about previous use and look for warning lights or evidence of emissions-system problems. look up the specific engine instead of going by generic diesel advice.
Compare alternatives using annual cost
Petrol, hybrid and electric alternatives each have different strengths. Work from mileage, journey length, charging access and purchase budget.
If a diesel genuinely suits your mileage, compare its insurance and maintenance costs with the petrol or hybrid alternatives before choosing.
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