Honda Insight 2005 Reference Owner's Manual page 145

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Transmission Fluid, Brake and Clutch Fluid
If Honda MTF is not available, you
may use an SAE 10W-30 or 10W-40
viscosity motor oil with the API
Certification seal that says ''FOR
GASOLINE ENGINES'' as a
temporary replacement. However,
motor oil does not contain the proper
additives, and continued use can
cause stiffer shifting. Replace as
soon as it is convenient.
The transmission should be drained
and refilled with new fluid according
to the time and distance recommen-
dations in the maintenance schedule.
If you are not sure how to check and
add fluid, contact your dealer.
144
Brake and Clutch Fluid
Check the fluid level in the
reservoirs monthly. There are up to
two reservoirs, depending on the
model. They are:
Brake fluid reservoir (all models)
Clutch fluid reservoir
(manual transmission only)
Replace the brake fluid according to
the recommendation in the
maintenance schedule.
Always use Honda Heavy Duty
Brake Fluid DOT 3. If it is not
available, you should use only DOT 3
or DOT 4 fluid, from a sealed
container, as a temporary
replacement.
Using any non-Honda brake fluid can
cause corrosion and decrease the life
of the system. Have the brake
system flushed and refilled with
Honda Heavy Duty Brake Fluid
DOT 3 as soon as possible.
Brake fluid marked DOT 5 is not
compatible with your vehicle's
braking system and can cause
extensive damage.