Patrick Sleat topped the Tamaraws with 13 points from a 9-of-11 clip from the charity stripe, to go with four rebounds and three assists, as Royce Alforque came off the bench to deliver 11 points and seven boards.
FEU blew San Sebastian away with a stunning 19-1 start, extending that spread to 24 points, 29-5, before the gritty San Sebastian crew buckled down in the second half.
Romel Calahat brought the Golden Stags to within three, 58-55, in the final 53 seconds, but Royce Alforque and James Tempra were there to put the final nail in the coffin.
"We just have to remind them of the fundamientals. Our team, especially our guards, like to gamble so we have to play disciplined," said deputy coach Eric Gonzales who called the shots in lieu of head coach Olsen Racela.
The win snapped FEU's two-game skid in Group B to rise to 1-2, while sending San Sebastian to a losing start in the preseason tourney.
Raymart Escobido paced the Golden Stags with 13 points in the defeat.
FEU 62 - Sleat 13, Alforque 11, Tempra 9, Sajonia 7, Torres 5, Gonzales 5, Sandagon 4, Bautista 4, Songcuya 2, Bagunu 2, Rosete 0, Dulatre 0, Guibao 0.
San Sebastian 55 - Escobido 13, Are 12, Sumoda 8, Una 6, Cosari 3, Garcia 3, Calahat 2, Ventura 2, Felebrico 2, Paglinawan 2, Ra. Gabat 2, Altamirano 0, Shanoda 0, Desoyo 0, Re. Gabat 0.
Quarterscores: 19-1; 32-15; 43-36; 62-55.
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