No SegBeg. Mayonnaise is not a instrument and horse relish is not an instrument either!
a mechanical tool or implement, especially one used for delicate or precision work:
a contrivance or apparatus for producing musical sounds:
a stringed instrument.
a means by which something is effected or done; agency:
an instrument of government.
a device for measuring the present value of a quantity under observation.
a mechanical or electronic measuring device, especially one used in navigation:
landing a plane by instruments.
a formal legal document, as a draft or bond:
a person used by another merely as a means to some private end; tool or dupe.
verb (used with object)
to equip with instruments, as a machine or manufacturing process:
to instrument a space vehicle.
to arrange a composition for musical instruments; orchestrate.
Based on the definition provided above, it is safe to say that Mayonnaise is not an instrument.