In this long-form article, we will dissect everything you need to know about the . From its technical architecture and performance specifications to common failures, maintenance schedules, and its place in the modern used-truck market. What is the Renault DF264? The Renault DF264 is a 6-cylinder, inline, turbocharged diesel engine with a displacement of 6.9 liters. It belongs to Renault’s “MIDR” (Moteur Industriel Diesel Renault) family, specifically the evolution known as the Midlum engine series.

While the Renault brand is globally recognized for passenger cars, its industrial division—Renault Trucks (now part of the Volvo Group)—has produced some of the most formidable diesel powerplants of the last three decades. The DF264 is not just an engine; it is the beating heart of the Renault Midlum and Premium Distribution ranges, as well as a popular choice for city buses and specialized industrial equipment.

However, for urban delivery work in 2025, modern Euro 6 engines (like the Renault DTI 8) offer superior fuel economy, lower noise, and legal access to city centers.

A: Only with a two-tank system and heated fuel lines. The VP44 pump is not tolerant of high-viscosity oils. For a pre-1998 mechanical DF264 (rare), yes—but not recommended.

| Interval | Action | |----------|--------| | | Engine oil change (15W-40 API CI-4 or higher), oil filter replacement. Check valve clearance (inlet 0.20mm, exhaust 0.40mm cold). | | Every 30,000 km | Replace fuel filter and water separator. Inspect air filter. | | Every 60,000 km | Change the coolant (OAT type). Replace the V-belt (alternator/water pump). | | Every 120,000 km | Calibrate the electronic injection timing (requires Renault CLIP diagnostic tool). Change gearbox oil (if ZF gearbox mated). | | Every 2 years | Brake fluid flush (for chassis-mounted air-over-hydraulic systems). | Critical Tip: The DF264 uses a dry liners system (wet liners on some very early blocks). Never run this engine with a faulty thermostat, as thermal shock will loosen the liners, leading to "liner cavitation" and coolant entering the sump. The DF264 in the Used Market (2025 Update) As emissions regulations tighten (Euro 6 and now Euro 7), the Renault DF264 (Euro 2/3) is being phased out of major urban centers due to Low Emission Zones (LEZs) in cities like London, Paris, and Berlin.