Oil-Best Engine Oil for Range Rover Sport L494 3.0 SDV6 (292/306 hp)
The Range Rover Sport L494 (2013–2022) is the second-generation Sport — a vehicle that elevated the Sport’s credentials from a Discovery-based derivative to a purpose-designed premium performance SUV on JLR’s lightweight aluminium architecture. The 3.0 SDV6 diesel (306DT, 292–306 hp) is the volume performance diesel choice: a twin-turbocharged V6 with 600–700 Nm, genuine motorway performance, and a 2,700 kg towing capability. The oil specification — STJLR.51.5122, 5W-30 ACEA C1 — is JLR’s own standard for the post-Ford era 306DT, and adherence to it is non-negotiable given the engine’s documented sensitivity to oil quality at high-load use.
Quick Answer: Recommended Oil
- Specification: STJLR.51.5122 / ACEA C1, 5W-30 full synthetic
- Alternative: Ford WSS-M2C934-B 5W-30 ACEA C1 (equivalent chemistry, fully compatible)
- Oil capacity with filter: 6.0 litres
- Oil capacity without filter: approx. 5.5 litres
The 306DT SDV6 in L494 Specification
The 306DT in the L494 Sport is the same core engine as in the Discovery 4 and full-size Range Rover, producing 292 hp (TDV6 single-turbo) or 306 hp (SDV6 bi-turbo) with peak torque of 600–700 Nm. In L494 form, the engine carries revised calibration for the Sport’s performance orientation — earlier turbo spool, more aggressive boost delivery — which places higher sustained thermal load on the oil at motorway and spirited driving speeds.
The L494’s aluminium architecture and lower vehicle weight (compared to the full-size Range Rover) improve performance-to-weight ratio, but the engine itself is the same architecture with the same oil requirements and the same failure modes. JLR developed STJLR.51.5122 as a comprehensive oil specification for all JLR vehicles post-Ford acquisition — it encompasses the DPF-safe low-SAPS chemistry of the Ford-era WSS-M2C934-B in a JLR-owned specification that allows any manufacturer’s approved product to be used.
Understanding STJLR.51.5122
STJLR.51.5122 is Jaguar Land Rover’s own oil specification, developed post-2008 (after Tata Group’s acquisition of JLR from Ford) to cover all JLR diesel applications with DPF aftertreatment. It requires ACEA C1 chemistry — sulphated ash ≤ 0.5%, phosphorus ≤ 0.05%, sulphur ≤ 0.2% — the strictest low-SAPS category. The specification also includes extended thermal stability testing appropriate for the high-load use cases typical of Range Rover Sport ownership: sustained towing, motorway driving at elevated speeds, and periodic off-road use.
Oils approved to WSS-M2C934-B are also suitable for the L494 SDV6 — the chemistry requirements are equivalent, and many quality oils carry both approvals.
Technical Specifications
| Specification | Value |
|---|---|
| Displacement | 2,993 cc |
| Layout | V6 60°, twin-turbodiesel |
| Engine code | 306DT |
| Power / Torque | 292–306 hp / 600–700 Nm |
| Turbocharger | Twin sequential |
| Aftertreatment | DPF + EGR |
| Timing system | Timing chain |
| Oil capacity (with filter) | 6.0 L |
| Recommended viscosity | 5W-30 |
| JLR specification | STJLR.51.5122 |
| ACEA classification | C1 |
Oil Change Intervals
JLR specifies condition-based intervals for the L494. For a Range Rover Sport used for performance-oriented driving, towing, or any high-load regular use, 10,000–12,000 miles or 12 months is the correct interval. For light-duty motorway use, 15,000 km or 12 months is the maximum. Check oil level monthly — the 306DT can consume 0.5–1L per 5,000 km at operating mileage, and the L494’s performance driving profile can increase this.
Critical Issues Related to Oil
Crankshaft failure: The 306DT’s most severe documented failure mode — crankshaft fracture or main bearing failure — has been reported across the Discovery 4, L494 Sport, and full-size Range Rover. The primary mechanism is oil dilution from incomplete DPF regeneration, compounded by extended intervals or incorrect oil. Oil dilution raises the oil level while simultaneously reducing viscosity; check for rising dipstick reading without refilling, or diesel smell in the oil. A thump or rumble from the bottom end under load requires immediate investigation.
EGR cooler leaks: The L494’s EGR cooler can fail, introducing coolant into the intake circuit and producing white smoke at idle and a coolant level drop. Monitor coolant level alongside oil level.
DPF regeneration: The Sport’s performance use often means higher exhaust temperatures and better passive DPF regeneration than a city-only Discovery 4. However, an L494 used as a daily short-trip commuter faces the same DPF management challenges — ensure periodic extended motorway runs.
Conclusion
The Range Rover Sport L494 3.0 SDV6 is a high-performance diesel SUV whose 306DT engine requires STJLR.51.5122 (or equivalent WSS-M2C934-B) 5W-30 ACEA C1 at 10,000–12,000-mile intervals. Monitor oil level monthly and be alert to the signs of oil dilution — a rising level or diesel smell indicates incomplete DPF regeneration and should be resolved before driving continues. Correct oil at correct intervals is the most effective protection against the 306DT’s documented crankshaft vulnerability.