CORRECT: NZ Refining hydrocracker upgrade gains lag estimate

CORRECT: NZ Refining hydrocracker upgrade gains lag estimate
(Fixes tense in fourth paragraph to show shutdown work was completed in April)) By Suze Metherell June 17 (BusinessDesk) - New Zealand Refining, the Marsden Point oil refinery controlled by its major customers, says upgrades to its hydrocracker have boosted efficiency even as it misses its original forecast margin. New Zealand's only oil refiner refitted its mild vacuum column as part of an efficiency drive to bolster margins and increase diesel production. It had forecast the refit, which boosts separation efficiency, would result in...