#1
★ Top Pick
HONDA MOTOR OIL 10W30 QT (PACK OF 2)
Honda's own 10W-30 motor oil is a straightforward match for the CB400, which calls for exactly this viscosity grade in most operating conditions. Using OEM-branded oil removes any guesswork about additive compatibility with Honda's wet clutch system, where third-party oils sometimes cause slipping. The two-quart pack covers a full oil change with a little left over. Caveat: this is conventional oil, so riders doing hard miles may prefer a full-synthetic alternative for better thermal stability.
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