Bowling Oil Patterns: House Shot vs Sport, and Ball Choice
Lanes · Oil & equipment · Updated 2026-07-10
Every lane is invisible-coated with oil in a deliberate pattern, and that pattern - not the pins - decides how your night goes. The same ball and the same shot can strike on one pattern and split on another.
Here's what's actually on the lane, and what to throw at it.
The house shot: a funnel to the pocket
A typical house shot (THS) runs 38-42 feet with heavy oil in the middle and dry outside boards. Miss right and the dry boards hook the ball back; pull it left and the oil holds it - the lane funnels misses toward the pocket. Ratios of 8:1 or 10:1 (middle-to-outside oil) are common. It's why league averages look heroic: the house shot forgives 3-4 boards of error.
Sport patterns: the truth serum
| House shot | Sport / challenge | |
|---|---|---|
| Oil ratio | 8:1 or steeper | 3:1 or flatter |
| Miss room | 3-4 boards | About 1 board |
| Typical scores | Inflated | 20-40 pins lower |
| Rewards | Repeatable-ish shots | Truly repeatable shots + reading transition |
Flat oil means a miss stays missed. PBA and sport-league patterns (Kegel's named series, USBC Open patterns) also come in different lengths: short patterns (35 ft) demand playing outside with control; long patterns (44+ ft) kill hook and reward straighter, firmer lines. And every pattern transitions as games strip the oil - the winning line at 7 PM is gone by 9.
Ball choice, pattern by pattern
- Fresh house shot: your benchmark reactive ball played through the funnel.
- Burned/late house shot: weaker ball or urethane, move left, chase the remaining oil.
- Short / flat patterns: urethane or polished weak reactive - smooth, predictable motion beats violent backend.
- Long patterns: stronger cover, slower speed, straighter angles.
- Corner-pin spares on anything: plastic, straight - the spare system doesn't care about oil.
Your arsenal, with receipts. Tag the ball on each shot and learn what actually carries on every pattern you bowl. Free on the App Store. Download Bowling Score Keeper & Tracker on the App Store.
Frequently asked questions
What is a house shot in bowling?
The everyday recreational oil pattern: 38-42 feet, heavy oil in the middle, dry outside. The wet/dry contrast funnels decent shots into the pocket, which is why house-shot averages run high.
Why is my average so much lower on a sport pattern?
Sport patterns are oiled nearly flat (3:1 or less), so the lane stops correcting your misses. A 20-40 pin drop from your house average is normal - USBC even publishes conversion charts between the two.
How do I know what oil pattern my center uses?
Ask the front desk or the mechanic - most centers run a named house pattern and will tell you the length. Tournament and sport-league patterns are published as graphs showing length and oil volume per board.
Does lane oil transition during a night?
Constantly. Balls strip and carry oil down the lane, drying your line and creating carrydown. Mid-session you'll typically move your feet left and slow down (or switch to a weaker ball) to chase the remaining oil.