FORD 1999 Taurus - Manual (Page 229)

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It may be necessary to add some oil between oil
changes. Make sure you use a CERTIFIED engine
oil of the preferred viscosity. Your vehicle’s
warranty coverage may not apply if engine damage
is caused by the use of improper engine oil.
Add engine oil through the oil filler cap highlighted
in yellow. To add oil, remove the filler cap and use
a funnel to pour oil into the opening. Be careful not
to overfill the engine. Recheck the oil level after
you finish adding oil.
Changing the Engine Oil and the Oil
Filter
Your vehicle has an OIL LIFE LEFT function as part
of the Vehicle Message Center (M/C). This device
displays the percent of useful engine oil life left and
when an oil change is required. Use of a
CERTIFIED oil of the preferred viscosity is required
for this device to work properly. Change your
engine oil and oil filter when the message center
displays CHANGE OIL SOON or OIL CHANGE
REQUIRED. If the Message Center malfunctions,
you may determine your oil change interval based
on the following guidelines.
Change your engine oil and oil filter according to
these mileage and time requirements, whichever
occurs first.
File:11fnmc8.ex
Update:Thu Jun 20 14:28:32 1996