Honda F401 Owner's Manual page 8

4. Fuel
Your engine is
number (q
designed to use any gasoline that has a pump octane
") of 86 or higher,
or that has a research oc-
tane number ;f 91 or higher. Gasoline pumps at service station normally
display the pump octane number.
We recommend that you use unleaded fuel because it produces fewer
engine and spark plug deposits and extends the life of exhaust system
components.
Never use stale or contaminated gasoline or an oil/gasoline mixture. Avoid
getting dirt, dust or water in the fuel tank. Use of a lower octane gasoline
can cause persistent "pinging" or heavy "spark knock" (a metallic rapping
noise) which, if severe, can lead to engine damage.
CAUTION: If "spark knock" or "pinging" occurs at a steady engine speed
under normal load, change brands of gasoline. If spark knock or pinging
persists, consult your authorized Honda dealer. Failure to do so is con-
sidered misuse, and damage caused by misuse is not covered by Honda's
Limited Warranty.
Occasionally you may experience light spark knock while operating under
heavy loads. This is no cause for concern, it simply means your engine is
operating efficiently.
CAUTION: Do not fill over the red level line.
Fuel tank capacity: F401.....1.4 ! (0.37 US Gal)
F501 . . . . . 2.6 l (0.69 US Gal)
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