The Vauxhall A30XF is a 2,969 cc, inline‑six naturally aspirated petrol engine produced between 1998 and 2004. It features a single overhead camshaft (SOHC), 12 valves, and sequential multi‑point fuel injection. In standard form it delivered 132 kW (180 PS) at 5,200 rpm and 265 Nm of torque at 4,000 rpm, providing smooth power delivery suited to executive saloon and estate applications.
Fitted exclusively to the Omega B (Vauxhall Omega 3.0i), the A30XF was engineered for…
All production years 1998–2004 meet Euro 3 standards (VCA UK Type Approval #VCA/EMS/3412). No Euro 4 variants exist.
The Vauxhall A30XF is a 2,969 cc inline‑six naturally aspirated petrol engine engineered for executive saloon and estate models (1998–2004). It combines sequential multi‑point fuel injection with a single overhead camshaft to deliver smooth, linear power and refined cruising characteristics. Designed to meet Euro 3 emissions standards, it prioritizes drivability and mechanical simplicity.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,969 cc | |
Fuel type | Petrol (Unleaded, 95 RON min) | |
Configuration | Inline‑6, SOHC, 12‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 86.0 mm × 85.0 mm | |
Power output | 132 kW (180 PS) @ 5,200 rpm | |
Torque | 265 Nm @ 4,000 rpm | |
Fuel system | Sequential multi‑point injection (Bosch Motronic M5.2) | |
Emissions standard | Euro 3 | |
Compression ratio | 10.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain‑driven SOHC | |
Oil type | GM 5W‑30 or 10W‑40 (ACEA A3/B3) | |
Dry weight | 178 kg |
The Vauxhall A30XF was used exclusively in the Vauxhall Omega B platform with longitudinal mounting and no external licensing. This engine received minor platform-specific adaptations—reinforced engine mounts and modified accessory brackets—and from 2001 the facelifted Omega B LCI adopted updated breather hoses and oil specifications, creating minor service part distinctions. All adaptations are documented in OEM technical bulletins.
The A30XF's primary reliability risk is oil sludge formation in the upper engine, with elevated incidence in vehicles subjected to frequent short trips or extended oil-change intervals. Vauxhall internal data (2002) noted rocker cover sludge in ~12% of pre-2001 engines beyond 80,000 km, while UK DVSA MOT records show increased oil consumption failures linked to blocked breather systems. Cold-climate operation and low-quality oil accelerate sludge buildup, making oil specification and driving pattern critical.
Analysis derived from Vauxhall technical bulletins (1999–2003) and UK DVSA failure statistics (2005–2015). Repair procedures should follow manufacturer guidelines.
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Generally yes with proper maintenance. Early models (1998–2000) are prone to oil sludge if service intervals are extended or short trips dominate. Post-2001 revisions improved ventilation. Using ACEA A3/B3 oil and adhering to 10,000 km service intervals greatly enhances longevity beyond 250,000 km.
Top issues include oil sludge in the rocker cover, timing chain tensioner wear, intake manifold gasket leaks, and plastic thermostat housing cracks. These are documented in Vauxhall SIB 99‑045 and owner service records.
The A30XF powered only the Vauxhall Omega B (1998–2004) in 3.0i variants. It was not used in other Vauxhall models or licensed to other manufacturers.
Modest gains are possible. ECU remaps typically yield +8–12 kW by optimizing ignition and fuel maps. Forced induction is not recommended due to SOHC valvetrain limitations and compression ratio constraints.
In an Omega 3.0i, expect ~11.5 L/100km (city) and ~7.8 L/100km (highway), or about 24 mpg UK combined. Real-world mixed driving typically returns 22–26 mpg (UK), depending on condition and driving style.
Yes. The A30XF is an interference design. If the timing chain fails, piston-to-valve contact can cause catastrophic damage. However, the chain is generally durable with proper oil maintenance.
ACEA A3/B3 5W‑30 or 10W‑40 is required (Vauxhall Owner’s Manual 1999). Change every 10,000 km or 12 months to prevent sludge and ensure proper lubrication of the SOHC valvetrain.
Comprehensive technical documentation and regulatory references
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GOV.UK: Vehicle Approval & V5C
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DVLA: Engine Changes & MoT
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Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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