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Best Engine Oil for Vauxhall Vivaro B 1.6 CDTi (120/140 hp)
The Vauxhall Vivaro B arrived in 2014 as a jointly developed commercial platform between Vauxhall/Opel, Renault, and Nissan — and the 1.6 CDTi engine is exclusively Renault-sourced. The R9M family, producing 95 and 115 hp in single-turbo form or 120 and 145 hp with the sequential biturbo arrangement, is the same engine found in the Renault Trafic III 1.6 dCi and Nissan NV300. This cross-brand origin has direct implications for oil specification: despite the Vauxhall badge, the correct oil standard is Renault’s own RN0720 — not a GM dexos2 formulation.
Quick Answer: Recommended Oil
- Specification: Renault RN0720 (ACEA C3, 5W-30)
- Alternative viscosity: 0W-30 (must still meet RN0720)
- Oil capacity with filter: 7.4 litres
- Oil capacity without filter: 6.5 litres
The R9M 1.6 CDTi Engine
The R9M is a 1,598cc four-cylinder turbodiesel with common-rail direct injection. The Vivaro B uses two distinct variants: the single-turbo R9M 450 at 120 hp and the sequential biturbo R9M 452 at 145 hp. The biturbo arrangement is sophisticated — a small fixed-vane unit provides immediate low-RPM boost response, while a larger variable-geometry turbocharger handles the mid-to-high range, creating linear torque delivery well-suited to van operation.
DPF fitment is standard across all R9M variants in the Vivaro B. The engine is shared near-identically with the Renault Trafic III 1.6 dCi — same block, same injection system, same DPF architecture. Both are built at Renault’s Cléon factory in France. The platform is also shared with the Nissan NV300 and Fiat Talento, all using the same oil specification.
Understanding Renault RN0720
The Renault RN0720 specification was developed specifically for Renault diesel engines equipped with a diesel particulate filter. It differs critically from the older norms:
- RN0700: petrol engines (not applicable here)
- RN0710: diesel engines without DPF
- RN0720: diesel engines with DPF — the correct specification for the R9M
RN0720 requires a low-SAPS chemistry — limiting sulphated ash, phosphorus, and sulphur — to protect the DPF from premature ash loading. It specifies a 5W-30 viscosity and maps broadly to ACEA C3 chemistry.
Despite the Vauxhall branding, GM dexos2 does not apply to R9M-engined Vivaro B variants — this engine is entirely Renault-designed and follows Renault’s own OEM certification pathway. An oil carrying Renault RN0720 approval with ACEA C3 (such as Castrol Edge 5W-30 LL C3 or Mobil 1 ESP 5W-30) is the correct choice. Using a standard ACEA A3/B4 5W-30, however high its quality, will exceed permissible SAPS limits and accelerate DPF ash loading significantly.
Technical Specifications
| Specification | Value |
|---|---|
| Displacement | 1,598 cc |
| Layout | 4-cylinder inline, turbodiesel |
| Engine codes | R9M 450 (120 hp) / R9M 452 (145 hp) |
| Power output | 95 / 115 / 120 / 145 hp |
| Injection system | Common-rail direct injection |
| Turbocharger | Single VGT or sequential biturbo |
| Oil capacity (with filter) | 7.4 litres |
| Oil capacity (without filter) | 6.5 litres |
| Recommended viscosity | 5W-30 |
| Alternative viscosity | 0W-30 |
| Renault OEM norm | RN0720 |
| ACEA classification | C3 |
Oil Change Intervals
Renault/Vauxhall specifies up to 30,000 km or 2 years under its long-life schedule — a figure that is entirely unsuitable for commercial van use in urban environments.
For Vivaro B vans doing mixed duty with regular longer runs, 10,000–12,000 km or 12 months is the recommended maximum. For urban delivery or predominantly stop-start use, reduce to 8,000 km or 6 months. Short journeys prevent the DPF from reaching passive regeneration temperatures, causing active forced regeneration to inject diesel late in the combustion cycle. Unburned diesel washes into the sump, diluting the oil and thinning it below specification. Diesel-diluted oil accelerates turbocharger bearing wear — particularly serious on the biturbo variants where both turbos depend on oil quality from cold start.
Why Correct Oil Matters for the R9M
The sequential biturbo arrangement demands excellent oil flow from cold start. The small primary turbo begins spinning immediately after engine start — if the oil is slow to circulate from degradation or incorrect viscosity, bearing wear begins within the first seconds of operation. The 5W-30 low cold-start viscosity ensures rapid circulation to both turbocharger units.
The DPF is the other critical concern. Urban-cycle Vivaro vans may spend weeks without completing a full passive regeneration, allowing soot to build progressively. Low-SAPS oil (RN0720) reduces the rate at which the DPF becomes ash-loaded, extending the effective interval before forced active regenerations become constant — and extending DPF service life from what might be 80,000 km with wrong oil to 200,000+ km with correct oil.
Common R9M Problems Related to Oil
EGR valve fouling: The single most documented complaint on the Vivaro B R9M. Soot from the EGR circuit accumulates in the valve and inlet manifold, causing rough idle, hesitation, and “Engine Failure Hazard” warnings. Regular oil changes reduce combustion by-products reaching the EGR.
DPF blockage: Chronic in urban or short-trip service. Correct low-SAPS RN0720 oil slows ash accumulation and extends DPF service life meaningfully.
Turbocharger failure: Reported on both single and biturbo variants, most commonly linked to extended oil intervals or oil diluted by diesel. VGT vanes can also stick with carbon if oil quality is poor, causing limp mode and boost fluctuation.
Timing chain tensioner wear: Early R9M units had documented tensioner wear above 100,000 miles. Fresh RN0720-specification oil maintains adequate lubrication of the chain tensioner and guides.
Conclusion
The Vauxhall Vivaro B 1.6 CDTi is a capable and refined commercial van engine — but its Renault-sourced R9M heart requires Renault-specification oil. Renault RN0720, 5W-30, ACEA C3 is non-negotiable, regardless of the Vauxhall badge. Pair this with commercially appropriate service intervals of no more than 10,000–12,000 km in mixed service, and the R9M will prove durable and reliable across high commercial mileages.
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As an Amazon Associate, we may earn from qualifying purchases. This doesn't affect our recommendations — we only suggest oils that hold the exact OEM approval for your engine.