Oak extension table are a popular choice for dining rooms due to their durability, classic look, and the ability to accommodate more guests when needed. Here are some key features and options:

1. Magnus Solid Wood Dining Table - Extension - Solid Oak:
   - This oak extension table from Icon By Design is made of solid American oak and features a seamless butterfly mechanism for easy extension. It's designed to last a lifetime with its refined, elegant combination of soft curves and clean lines. The table extends to accommodate a crowd, and no one will feel crowded.

2. Jackson Round Extension Dining Table - Solid Oak:
   - The Jackson Round Extension Dining Table extends from 51 to 67 inches, making it ideal for a small dining area or family kitchen. It seats up to four people but extends to seat six. The table offers both style and functionality with its solid oak construction.

3. Venus Extension Table:
   - Crafted from solid Tasmanian oak, the Venus oak extension table has pull-out leaves on both ends, allowing it to extend to accommodate more guests. It's available in different sizes to suit various needs and comes with a timeless look.

4. EKEDALEN extendable table oak - IKEA:
   - IKEA's EKEDALEN table is designed with no seams when not extended, and the legs are always in the corners of the table top, providing plenty of room for chairs underneath. It includes a self-storing leaf that makes it easy to extend the table from seating four to six.

5. Magnus Extension Dining Table - Solid Oak:
   - Another option from Icon By Design, this oak extension table is made of solid American oak and features an easy sliding mechanism to accommodate extra guests. It's inspired by Scandinavian and Mid-century modern furniture movements.

6. Tasmanian Oak 2000-3000 Extension Dining Table:
   - This oak extension table from Living Elements seats up to 12 people when fully extended or eight in the fully closed position. It's crafted from select grade Tasmanian Oak timbers with a clean and consistent grain.

7. EKEDALEN extendable dining table, oak - IKEA:
   - This IKEA table is a durable option that can be easily extended by a single person. It's designed to match well with EKEDALEN chairs and other styles from IKEA.

8. Vinson Extension Dining Table | Oak Table:
   - Ethan Allen's Vinson table features Parsons legs with updated interior notched details and a stacked top profile in rich, wire-brushed oak. It extends to 98 inches with one 20-inch leaf, seating up to 10.

When choosing an oak extension table, consider the size of your dining area, the number of guests you typically entertain, and the style that best fits your home decor. Each of these tables offers unique features, so it's important to select one that meets your specific needs and preferences.