The Chevy 302 engine (also known as the DZ 302) is one of the most legendary high-revving small-block V8 engines ever built by Chevrolet. Designed specifically for the Camaro Z/28 Trans-Am racing program, it became famous for its extreme RPM capability and racing performance.
In this complete guide, you will learn Chevy 302 engine specifications, oil type, oil capacity, maintenance schedule, reliability, rebuild cost, and real-world performance insights.
Chevy 302 Engine Overview
The Chevy 302 was built using a combination of a 4.00-inch bore (from the 327 block) and a 3.00-inch stroke (from the 283 crankshaft), creating a 302 cubic inch displacement.
It was designed specifically for SCCA Trans-Am racing and was used mainly in the 1967–1969 Camaro Z/28 models. Unlike regular small-block engines, it was engineered for high RPM power rather than low-end torque.
Chevy 302 Engine Oil Type
The recommended engine oil for Chevy 302 depends on usage and climate conditions. Because this is a flat-tappet cam engine, zinc (ZDDP) protection is very important.
- SAE 10W-30 (most common recommendation)
- SAE 10W-40 (hot climate / performance use)
- High zinc / ZDDP additive oil required for cam protection
Chevy 302 Engine Oil Capacity
Configuration | Oil Capacity |
|---|---|
With Oil Filter | Approximately 5 quarts (4.7 liters) |
Dry Engine Rebuild Fill | 5–5.5 quarts |
Chevy 302 Oil Change Interval
Usage Type | Oil Change Interval |
|---|---|
Normal Street Use | 3,000 – 4,000 miles |
Performance Driving | 2,000 – 3,000 miles |
Track / Racing Use | After every race or 1,000–2,000 miles |
Chevy 302 Engine Oil Change Cost
- DIY oil change: $40 – $90
- Classic car shop service: $100 – $180
- Performance rebuild maintenance: $150 – $250
Cost varies depending on oil quality, zinc additives, and filter type.
Chevy 302 Engine Specifications
- Engine Type: Small-block V8
- Displacement: 302 cubic inches (5.0L)
- Horsepower: ~290 HP
- Torque: ~290 lb-ft
- Bore x Stroke: 4.00 x 3.00 inches
- Fuel System: Carbureted
Best Oil Brands for Chevy 302
- Valvoline VR1 Racing Oil 10W-30
- Brad Penn High Zinc Oil
- Driven Racing Oil HR Series
- Lucas Hot Rod & Classic Oil
- Shell Rotella T4 (ZDDP added)
Common Chevy 302 Engine Problems
- Flat-tappet cam wear without proper zinc oil
- High RPM valve train stress
- Fuel consumption at low speeds
- Cold start wear if not warmed properly
- Oil leakage in older rebuilds
Maintenance Tips for Longer Engine Life
- Always use high zinc (ZDDP) oil
- Do not over-rev during cold starts
- Change oil every 3,000 miles or less
- Inspect valve train regularly
- Use quality oil filters (AC Delco / Wix)
- Maintain correct ignition timing
Frequently Asked Questions (FAQs)
What oil does a Chevy 302 engine take?
The Chevy 302 uses SAE 10W-30 high-zinc oil to protect its flat-tappet camshaft.
How much oil does a Chevy 302 hold?
It typically holds around 5 quarts of engine oil with filter change.
Is the Chevy 302 engine reliable?
Yes, it is reliable when maintained properly with correct oil and frequent service intervals.
Why is the Chevy 302 special?
It was a high-revving racing engine built specifically for Camaro Z/28 Trans-Am competition.
Final Thoughts
The Chevy 302 engine remains one of the most iconic small-block V8 engines in automotive history. With proper high-zinc oil, regular maintenance, and careful driving habits, it can deliver exceptional performance and long-term durability.