The GM LT4 engine is a high-performance 6.2L supercharged V8 that powers some of the most powerful production vehicles ever built,
including the Corvette Z06, Camaro ZL1, Cadillac CTS-V, and Escalade-V.
Known for extreme horsepower, forged internals, and a factory supercharger, the LT4 is one of GM’s most advanced small-block engines.
In this guide, you’ll find complete LT4 engine specs, oil type, capacity, performance data, and maintenance details.
Overview of LT4 Engine
The LT4 is part of GM’s Gen V Small Block engine family. It is a 6.2-liter V8 equipped with a 1.7L Eaton supercharger,
delivering factory-rated supercar-level performance while maintaining durability and drivability.
It was first introduced in the Corvette C7 Z06 and later used in multiple high-performance Cadillac and Chevrolet models.
LT4 Engine Specifications
LT4 Engine Oil Type
The LT4 engine operates under extreme heat and boost pressure, requiring high-quality synthetic oil for protection.
- 0W-40 Full Synthetic Oil – Recommended for performance and track use
- 5W-30 Synthetic Oil – Standard street driving (older guidance)
Important: Many performance LT4 applications now prefer 0W-40 oil due to higher heat resistance and better protection under boost.
LT4 Oil Capacity
- Oil capacity (with filter): ~9.0 quarts (dry sump system)
- System type: Dry sump lubrication with external reservoir
The dry sump system ensures stable oil pressure even under extreme cornering and high RPM conditions.
LT4 Engine Performance
- 0–60 mph: ~3.5 seconds (vehicle dependent)
- Top speed: 190+ mph (model dependent)
- Boost pressure: ~9+ psi
- Thermal efficiency optimized for high-output performance
LT4 Engine Cost
- Crate engine price: $15,000 – $20,000+
- Full swap cost: $20,000 – $35,000+
Common LT4 Engine Problems
Supercharger Heat Build-Up
Extended high-load driving can increase intake temperatures without proper cooling upgrades.
Oil Degradation
High-performance use can break down oil faster, requiring frequent changes.
Carbon Deposits
Direct injection systems may lead to intake valve carbon buildup over time.
Maintenance Tips
- Use only high-quality synthetic 0W-40 or approved oil
- Change oil every 3,000–5,000 miles under performance use
- Inspect supercharger system regularly
- Maintain cooling system efficiency
- Replace filters frequently
Frequently Asked Questions (FAQ)
What is the horsepower of the LT4 engine?
The LT4 produces approximately 640 horsepower depending on application.
What oil does LT4 engine use?
It uses high-performance synthetic oil, commonly 0W-40 or 5W-30 depending on usage conditions.
How much oil does LT4 hold?
The LT4 dry sump system holds around 9 quarts of oil.
Is the LT4 engine reliable?
Yes, it is highly reliable when maintained properly with frequent oil changes and quality synthetic oil.
Final Thoughts
The LT4 engine is one of GM’s most powerful and advanced V8 engines, combining supercharging, precision engineering, and durability.
With proper maintenance and correct oil selection, it delivers exceptional long-term performance in high-output vehicles.