Because
a motor oil’s service life can be greatly affected by vehicle operating
conditions, AMSOIL provides definitions for normal and severe service and
recommends corresponding drain intervals for each. One of the conditions used
to identify severe service is “excessive idling.” Because this term is somewhat
ambiguous, AMSOIL is adding a 700-hour limitation to its Signature Series
Synthetic Motor Oil drain interval for vehicles subjected to excessive idling.
In normal service, Signature Series is recommended for up to 25,000 miles, 700
hours of operation or one year, whichever comes first. In severe service,
Signature Series is recommended for up to 15,000 miles, 700 hours of service or
one year, whichever comes first.
More information:
AMSOIL Signature Series Synthetic Motor Oils
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