The GM LS engine family is one of the most popular V8 platforms in automotive history. Known for its durability, tuning potential, and high torque output, LS engines are widely used in Chevrolet, GMC, Cadillac, and performance swap builds.
Understanding correct LS engine torque specs, oil requirements, and maintenance intervals is critical for performance builds, rebuilds, and long-term reliability.
What is the LS Engine Family?
The LS engine family refers to a series of modern small-block V8 engines developed by General Motors. These engines replaced the older LT1 and LT4 platforms and introduced improved airflow, better efficiency, and higher torque output.
LS engines are commonly found in performance cars, trucks, and swap projects due to their strong aftermarket support and reliability.
LS Engine Torque Specs (General Reference)
Torque specifications vary depending on LS engine version (LS1, LS2, LS3, LS7, etc.). Below are general torque values used in most LS rebuild and assembly procedures.
Important: Always follow exact factory service manual torque sequence when rebuilding LS engines to avoid head gasket or bearing failure.
LS Engine Oil Type
Most LS engines use SAE 5W-30 full synthetic oil as the factory-recommended lubricant. Some modern performance LS engines may also use 0W-40 depending on temperature and performance application.
High-quality synthetic oil is essential for maintaining oil pressure stability, especially in high-RPM or modified LS engines.
LS Engine Oil Capacity
Oil capacity depends on the specific LS variant and oil pan design.
LS Engine Firing Order
The standard LS engine firing order is:
Best Oil for LS Engines
- Mobil 1 5W-30 Full Synthetic
- Castrol EDGE 5W-30
- Valvoline Advanced Full Synthetic 5W-30
- Royal Purple High Performance 5W-30
- ACDelco Dexos1 Gen3 Oil
Common LS Engine Problems
LS Engine Maintenance Tips
- Use full synthetic oil only
- Change oil every 5,000–7,500 miles
- Monitor oil pressure regularly
- Use correct torque specs during rebuild
- Maintain proper cooling system setup
Frequently Asked Questions (FAQs)
What torque specs should I use for LS heads?
Most LS engines use a torque-to-yield pattern: 22 ft-lb followed by angle tightening (90° + 70°).
What oil does an LS engine use?
Most LS engines use SAE 5W-30 full synthetic oil for best protection and performance.
How much oil does an LS engine hold?
Oil capacity ranges from 5.0 to 6.5 quarts depending on LS variant.
What is the LS firing order?
The LS firing order is 1-8-7-2-6-5-4-3.
Final Summary
- Torque Specs: Head 22 ft-lb + angle
- Oil Type: 5W-30 Synthetic
- Oil Capacity: 5.0–6.5 Quarts
- Firing Order: 1-8-7-2-6-5-4-3
- Best Use: Performance + Swap Engines