Is 10w-30 oil recommended for a 1988 Mazda rx7?

RX-7 4V is 4.2 - 4.4 quarts

RX-7 FI is 4.4 - 4.7 quarts

for 1981-1990 rx7, it is recommended to run:

above 15*F (-9*C) - 20w40, 20w50

above -15*F (-26*C) - 10w40, 10w50

-15*F to 85*F (-26*C to 29*C) - 10w30

Below 32*F (0*C) - 5w30

below 0*F (-18*C) - 5W20

for 1991

above -15*F (-25*C) - 10w30

Below 32*F (0*C) - 5w30