Buick Straight 8 Engine Specs
Introduction
The Buick Straight 8 engine is a classic piece of automotive engineering that has left a lasting impact on the industry. Known for its smooth performance and longevity, this engine has become a favorite among car enthusiasts and collectors. In this article, we will delve into the specifications of the Buick Straight 8 engine, its configuration, and the engine oil specs and service intervals.
Engine Configuration
The Buick Straight 8 engine is an inline eight-cylinder engine that was produced by Buick from 1931 to 1953. It was a significant departure from the previous inline-six engines and brought several improvements in terms of power and performance. Here are some key features of the Buick Straight 8 engine configuration:
– Cylinder Layout: The engine consists of eight cylinders arranged in a straight line, hence the name “Straight 8.” This configuration allows for smooth power delivery and balanced performance.
– Displacement: The engine had various displacements throughout its production years, ranging from 233 cubic inches (3.8 liters) to 320 cubic inches (5.3 liters). The larger displacement versions offered more power and torque.
– Overhead Valve Design: The Buick Straight 8 engine featured an overhead valve design, which improved efficiency and allowed for higher compression ratios.
– Cast Iron Block: The engine block was made of cast iron, ensuring durability and strength.
– Carburetion: Most models of the Buick Straight 8 engine were equipped with a single or dual-barrel carburetor, providing efficient fuel delivery.
Engine Oil Specs & Service Intervals
Proper maintenance and regular oil changes are crucial for the longevity and performance of any engine, including the Buick Straight 8. Here are the recommended engine oil specs and service intervals for this iconic engine:
– Engine Oil Type: The Buick Straight 8 engine requires a high-quality engine oil with a viscosity rating of 10W-30 or 10W-40. It is essential to use oil that meets the API (American Petroleum Institute) service classification of SF or higher.
– Oil Capacity: The oil capacity of the Buick Straight 8 engine varies depending on the specific model and year. On average, it holds approximately 5 to 6 quarts of oil, including the oil filter.
– Service Intervals: It is recommended to change the engine oil and oil filter every 3,000 to 5,000 miles or every six months, whichever comes first. Regular oil changes help maintain proper lubrication and prevent engine wear.
Detailed Engine Specifications
| Engine Model | Displacement (Cubic Inches) | Displacement (Liters) | Horsepower | Torque (lb-ft) |
|---|---|---|---|---|
| 1931-1933 | 233 | 3.8 | 90-100 | 190-200 |
| 1934-1936 | 248 | 4.1 | 93-100 | 200-210 |
| 1937-1948 | 248 | 4.1 | 107-120 | 220-235 |
| 1949-1953 | 263-320 | 4.3-5.3 | 120-152 | 255-333 |
Please note that the specifications provided in the table are approximate and may vary depending on the specific model and year of the Buick Straight 8 engine.
Conclusion
The Buick Straight 8 engine is a remarkable piece of automotive history, known for its smooth performance and reliability. With its inline eight-cylinder configuration and various displacement options, this engine has left an indelible mark on the industry. By adhering to the recommended engine oil specs and service intervals, you can ensure that your Buick Straight 8 engine continues to deliver its best performance for years to come.
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