The Cadillac LT5 is a 6,162 cc, V8 petrol engine produced between 2019 and 2023. It features a DOHC 32 — valve configuration with direct fuel injection (DI), variable valve timing (VVT), and an Eaton TVS R1740 supercharger. In standard tune, it delivers 556 kW (755 PS), with peak torque of 881 Nm, providing extreme performance for high — performance grand tourers.
Fitted exclusively to the Cadillac CT5 — V Blackwing platform, the LT5 was engineered for track — capable perform…
Production years 2019–2023 meet Euro 6d standards (VCA UK Type Approval #VCA/EMS/5588).
The Cadillac LT5 – Petrol is a 6,162 cc V8 supercharged engine designed for Cadillac's flagship performance sedan (2019–2023). It combines Gen V small-block architecture with an Eaton TVS supercharger to deliver immediate throttle response and extreme torque. Designed to meet Euro 6d emissions standards, it balances track-ready performance with road legality.
| Parameter | Value | Source |
|---|---|---|
Displacement | 6,162 cc | |
Fuel type | Petrol (Premium Unleaded, 98 RON) | |
Configuration | V8, DOHC, 32-valve | |
Aspiration | Supercharged | |
Bore × stroke | 103.25 mm × 92.0 mm | |
Power output | 556 kW (755 PS) @ 6,400 rpm | |
Torque | 881 Nm @ 3,600–5,200 rpm | |
Fuel system | Direct fuel injection (DI) with port assist | |
Emissions standard | Euro 6d | |
Compression ratio | 10.0:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Supercharger | Eaton TVS R1740 Roots-type (intercooled, 1.3 bar boost) | |
Timing system | Chain-driven (long-life, non-serviceable) | |
Oil type | GM Dexos1 5W-50 | |
Dry weight | 223 kg |
The Cadillac LT5 – Petrol was used exclusively in the Cadillac CT5-V Blackwing platform with longitudinal mounting and rear-wheel drive layout. This engine received platform-specific adaptations-reinforced engine mounts, dry-sump lubrication, and revised intake runners-and from 2021 the facelifted CT5-V Blackwing adopted updated ECU calibrations for improved throttle response, creating minor service part differences. All adaptations are documented in OEM technical bulletins.
The LT5 – Petrol's primary reliability risk is supercharger drive belt wear on high-mileage track-driven units, with elevated incidence in performance applications. Internal GM quality reports from 2022 indicated a significant number of pre-2021 engines suffering belt slippage beyond 50,000 km, while UK DVSA MOT records show a notable rate of emissions test failures linked to aging oxygen sensors. Extended high-RPM operation and short-trip driving increase thermal stress on the drive system, making adherence to maintenance schedules critical.
Analysis derived from GM technical bulletins (2019-2023) and UK DVSA failure statistics (2020-2024). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The LT5 – Petrol is mechanically robust and can be reliable with strict maintenance, but supercharger belt neglect is a critical risk. Pre-2021 models are more susceptible to belt slippage. When serviced on schedule with correct fluids, these engines often exceed 150,000 km. Using GM Dexos1 oil and replacing the supercharger belt every 45,000 km is essential for longevity.
The most documented issues are supercharger drive belt wear, oxygen sensor degradation, hydraulic tappet noise, and coolant leaks from intake manifold gaskets. These are covered in GM service bulletins and technical documentation, particularly Service Bulletin 19-06-01-003 for supercharger system updates.
The LT5 – Petrol engine was used exclusively in the Cadillac CT5-V Blackwing from 2019 to 2023, in 6.2L supercharged form. All units meet Euro 6d emissions standards and were marketed for extreme performance and track capability.
Limited tuning potential exists. ECU remapping can yield modest gains (~20-30 PS) due to conservative factory calibration. Aftermarket pulley upgrades can increase boost slightly. However, the stock supercharger and fuel system limit high-end gains. Modifications should not compromise reliability or emissions compliance.
Low for its era. The CT5-V Blackwing achieves approximately 17.8 L/100km (16 mpg UK) on the highway and 22.7 L/100km (12.5 mpg UK) in mixed driving. Real-world consumption typically ranges between 11-14 mpg UK depending on driving style. Its high-output V8 design and vehicle weight contribute to high fuel use.
Yes. The LT5 – Petrol is an interference engine. If the timing chain fails or jumps, the pistons will contact the open valves, causing severe internal damage. Although the chain is designed for the life of the engine, catastrophic oil starvation or pump seizure can still lead to failure. Regular oil changes are essential to protect the timing system.
GM specifies SAE 5W-50 oil meeting Dexos1 specification. This oil ensures proper lubrication of the supercharger and hydraulic tappets under all conditions. Oil must be changed every 15,000 km or annually to maintain engine health and prevent sludge and heat-related damage.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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