The new zeolite ITQ-7 (ISV structure) has been tested as an additive of USY zeolites for gasoil cracking. The dimensions of its tridirectional system of channels, with pores between 6.1 and 6.3 Angstrom .and with lower tortuosity than those of the Beta zeolite, favor beta -scission versus protolytic cracking and limit the extension of hydrogen transfer reactions. In the catalytic cracking of gasoil, when comparing with Beta zeolite, ITQ-7 produces higher gasoline yield, with lower content of aromatics, more isoamylenes, and higher olefinicity in the LPG fraction. (C) 2001 Academic Press.