are the maintenance requirements?
The Donaldson bypass filter we provide has a
recommended service life of 25,000 miles. We recommend checking the filter
periodically as part of your normal maintenance routine. This consists of
placing your hand on it while the engine is at operating temperature: A hot
filter is active, a cold filter is clogged. By the way, if the bypass filter does happen
to be clogged, the full-flow
filter takes over, just as if it was working alone.
Oil sampling can provide you with data to determining your best oil change cycle. The
number of fleets doing annual or biannual oil/filter maintenance is
growing. Under normal operating conditions,
this is becoming a typical service interval.
If requested, we can offer other Donaldson filters with higher or lower filter media density. (see Chart 1 for an oil analysis after 30,000 miles of travel without an oil change on a 2008 Toyota FJ Cruiser).