Davey Todd boosted his championship lead as he beat Charlie Nesbitt to the opening win by 0.187.
Polesitter Alex Olsen crossed the line third on his FHO Racing with Kobelco BMW after losing two places on the last lap as Billy McConnell took fourth and Tom Ward fifth.
Pirelli National Superstock Championship with MotoNovo, Oulton Park, Race One:
1. Davey Todd (Milenco by Padgetts Motorcycles)
2. Charlie Nesbitt (VisionTrack Suzuki) +0.187s
3. Alex Olsen (FHO Racing with Kobelco) 0.448s
4. Billy McConnell (C&L Fairburn Properties/Jackson Racing) +1.169s
5. Tom Ward (IN Competition/Aprilia) +1.723s