PETRON defeated Sta. Lucia, 25-18, 25-16, 25-20, on Tuesday to get back on track in the PSL All-Filipino Conference at the Filoil Flying V Centre in San Juan.
Bernadeth Pons led the way with 10 points, six on attacks and three on aces, as the Blaze Spikers climbed to 2-1 at the end of the first round in Pool A.
The Blaze Spikers bounced back from a four-set loss to Cignal last week.
"Kailangan mag-focus kami sa lahat ng ginagawa namin," said Petron coach Shaq Delos Santos.
"Kanina marami kaming attack errors. Kailangan namin gandahan 'yung first ball para maka-set ng play."
Aiza Maizo-Pontillas added nine points, while Sisi Rondina contributed seven points for the Blaze Spikers.
Fil-American Mar-Jana Phillips had 12 points for the Realtors, winless in two matches.