Honda 1997 Prelude Owner's Manual page 156

5-speed Manual Transmission
Correct
level
Check the fluid level with the
transmission at normal operating
temperature and the vehicle sitting
on level ground. Remove the
transmission filler bolt and carefully
feel inside the bolt hole with your
finger. The fluid level should be up
to the edge of the bolt hole. If it is
not, add Genuine Honda Manual
Transmission Fluid (MTF) until it
starts to run out of the hole. Reinstall
the filler bolt and tighten it securely.
If Honda MTF is not available, you
may use an API service SG or SH
grade motor oil with a viscosity of
SAE 10W-30 or 10W-40 as a
FILLER
temporary replacement. However,
BOLT
motor oil does not contain the proper
additives and continued use can
cause stiffer shifting. Replace as
soon as convenient.
The transmission should be drained
and refilled with new fluid according
to the time and distance recommen-
dations in the maintenance schedule.
Transmission Fluid
Maintenance