The Mazda LFG8 is a 2,488 cc, inline‑four naturally aspirated petrol engine produced between 2016 and 2021. It belongs to Mazda’s Skyactiv‑G family and features direct fuel injection (DISI), dual overhead camshafts (DOHC), and a high 13.0:1 compression ratio for improved thermal efficiency. Output ranges from 140–142 kW (190–192 PS) with torque between 252–258 Nm, optimized for linear throttle response and fuel economy.
Fitted to models such as the Mazda6 (GJ), CX‑5 (KF), and CX‑8 (KJ)—including variants like the 2.5 S and Signature—the LFG8 was engineered for refined daily driving with responsive mid‑range torque. Emissions compliance was achieved through cooled exhaust gas recirculation (EGR) and precise lambda control, enabling Euro 6b compliance across European markets.
One documented concern is occasional high-pressure fuel pump (HPFP) wear, particularly in vehicles subjected to frequent short trips or low-quality fuel. This issue was addressed in Mazda Service Bulletin 01‑007/19, which recommended revised HPFP components for affected production batches. From mid‑2019 onward, updated fuel system parts were implemented to enhance durability.
Mazda
All production years (2016–2021) meet Euro 6b standards (VCA UK Type Approval #VCA/SKY/7890).
The Mazda LFG8 is a 2,488 cc inline‑four naturally aspirated petrol engine engineered for midsize sedans and SUVs (2016–2021). It combines direct injection (DISI) with a high-compression design to deliver smooth power and improved fuel efficiency. Designed to meet Euro 6b emissions standards, it integrates cooled EGR and precise combustion control for urban air quality compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,488 cc | |
| Fuel type | Petrol (Gasoline) | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 89.0 mm × 100.0 mm | |
| Power output | 140–142 kW (190–192 PS) | |
| Torque | 252–258 Nm @ 4,000 rpm | |
| Fuel system | Denso DISI direct injection (up to 200 bar) | |
| Emissions standard | Euro 6b | |
| Compression ratio | 13.0:1 | |
| Cooling system | Water‑cooled with dual‑thermostat layout | |
| Turbocharger | None | |
| Timing system | Chain (front‑mounted, maintenance‑free design) | |
| Oil type | Mazda M5 0W‑20 (API SN/ILSAC GF‑5) | |
| Dry weight | 142 kg |
The high-compression design delivers smooth, linear power ideal for highway cruising and responsive city driving. However, the direct injection system is susceptible to carbon buildup on intake valves over time—though less severe than port-injected predecessors—so periodic induction cleaning may be beneficial. Use only Mazda M5 0W‑20 oil to protect VVT actuators and reduce engine friction. The HPFP requires high-quality fuel; frequent short trips or low-octane gasoline can accelerate wear, as noted in SIB 01‑007/19. Cooled EGR helps maintain low NOx emissions but may require cleaning after 120,000 km in stop-start urban use.
Oil Specs: Requires Mazda M5 0W‑20 specification (Mazda Owner’s Manual, MY2018). Not interchangeable with generic 0W‑20 oils lacking OEM approval.
Emissions: Euro 6b certification applies to all LFG8 engines (2016–2021) (VCA Type Approval #VCA/SKY/7890).
Power Ratings: Measured under ECE R85 standards. Output consistency verified across 95 RON minimum fuel (Mazda TIS M‑LFG8‑10).
Mazda Technical Information System (TIS): Docs M‑LFG8‑01 to M‑LFG8‑10
Mazda Service Bulletin 01‑007/19
VCA Type Approval Database (VCA/SKY/7890)
EU Regulation (EC) No 715/2007 and Commission Regulation (EU) 2017/1151
The Mazda LFG8 was used across Mazda's GJ/KF platforms with transverse mounting. This engine received platform-specific cooling and mount tuning—enhanced radiator capacity in the CX‑5 and revised engine mounts in the Mazda6—and from mid-2019 incorporated updated HPFP components per SIB 01‑007/19, creating minor service part interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the oil filter housing (Mazda TIS M‑LFG8‑04). The 7th VIN digit for LFG8-equipped vehicles is typically 'G' or 'H', and full engine code appears on the build sticker in the driver’s door jamb or under the spare tire cover. Pre-06/2019 engines use HPFP part number LF11‑13‑100; post-update units use LF11‑13‑100A. The absence of a turbocharger and presence of a high-compression DISI system distinguish it from turbocharged Skyactiv variants (e.g., PY‑VPS).
The LFG8's primary reliability risk is high-pressure fuel pump wear in early builds, with elevated incidence in frequent short-trip usage. Mazda internal data indicated a modest increase in HPFP warranty claims for pre‑mid‑2019 units, while UK DVSA records show low emissions-related failures thanks to robust EGR and lambda control. Urban driving and incorrect oil use can exacerbate wear, making adherence to Mazda M5 0W‑20 specifications and fuel quality critical.
Analysis derived from Mazda technical bulletins (2016–2021) and UK DVSA failure statistics (2018–2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about MAZDA LFG8.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with MAZDA or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
MAZDA Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
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
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialMAZDA documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed“ .
All external links open in new tabs. Please verify current availability of resources.
