1. to convert (an engine or vehicle) to run on diesel fuel instead of petrol
Usage: chiefly British English; also spelled 'dieselize' in American English
2. to equip or supply with diesel engines or diesel fuel
Usage: chiefly British English

Examples

• The company decided to dieselise its fleet of delivery trucks to reduce fuel costs.
• Many European manufacturers have begun to dieselise their vehicle lineups.
• The old petrol engine was dieselised to improve fuel efficiency.
• Governments have incentivized efforts to dieselise public transportation systems.
• After dieselising the bus fleet, the transit authority saw significant savings in operating expenses.