The 1966 Jaguar E-Type Series I 4.2 Roadster is one of the most iconic British sports cars ever built. Famous for its timeless design, inline-6 performance, and racing heritage, it remains a highly valuable collector’s car in today’s classic market.
In this complete guide, you will learn Jaguar E-Type 4.2 engine specifications, oil type, oil capacity, maintenance interval, restoration cost, and real-world ownership insights.
1966 Jaguar E-Type Overview
The 1966 E-Type Series I represents the most desirable early version of Jaguar’s legendary sports car. It features a 4.2L XK inline-6 engine, improved gearbox, and upgraded braking system compared to earlier models.
This model is widely considered one of the most beautiful cars ever made, combining performance with elegant British engineering.
Engine Specifications
- Engine Type: 4.2L XK Inline-6
- Displacement: 4235 cc
- Horsepower: ~265 HP
- Torque: ~384 Nm
- Fuel System: Triple carburetors
- Valvetrain: DOHC
- Drive Type: Rear-wheel drive
Jaguar E-Type 4.2 Engine Oil Type
The recommended engine oil for Jaguar E-Type 4.2 depends on climate and usage. Since this is a classic engine, thicker high-zinc oils are preferred.
- SAE 20W-50 (best overall classic choice)
- SAE 10W-40 for moderate climates
- High-zinc (ZDDP) classic engine oil strongly recommended
Engine Oil Capacity
Engine Type | Oil Capacity |
|---|---|
4.2L XK Inline-6 | 8.5 Liters (with filter) |
Oil Change Interval
Usage Condition | Oil Change Interval |
|---|---|
Regular Driving | 3,000 – 4,000 miles |
Weekend / Collector Use | Once per year |
Long Storage Vehicles | Change before storage & after restart |
Oil Change Cost
- DIY oil change: $60 – $120
- Classic car specialist: $120 – $250
- Full restoration service: $250 – $500
Cost depends on oil quality, labor, and restoration condition.
Best Oil Brands for Jaguar E-Type
- Valvoline VR1 Racing Oil
- Lucas Classic Car Oil
- Castrol Classic 20W-50
- Penrite Classic Oil
- Motul Classic 20W-50
Common Engine Issues
- Oil leaks from aging seals
- Carburetor tuning sensitivity
- Cooling system overheating in traffic
- Worn valve seals in high mileage engines
- Electrical issues in older restorations
Maintenance Tips
- Always use high-zinc classic oil
- Change oil every 3,000 miles
- Warm engine before driving
- Inspect cooling system regularly
- Use premium fuel for best performance
- Maintain carburetor tuning
Frequently Asked Questions (FAQs)
What oil does a 1966 Jaguar E-Type take?
The Jaguar E-Type 4.2 typically uses SAE 20W-50 high-zinc classic engine oil.
How much oil does the E-Type 4.2 hold?
It holds approximately 8.5 liters of engine oil with filter change.
Is the Jaguar E-Type reliable?
Yes, it is reliable when properly maintained with regular oil changes and cooling system care.
Why is the Jaguar E-Type so famous?
It is considered one of the most beautiful cars ever built and a symbol of British automotive design.
Final Thoughts
The 1966 Jaguar E-Type Series I 4.2 Roadster remains a timeless classic that blends performance, elegance, and heritage. With proper maintenance, correct oil selection, and careful preservation, it continues to be one of the most desirable collector cars in the world.