When To Add Engine Oil - Chevrolet S10 Pickup 2003 Owner's Manual

Turn off the engine and give the oil several minutes to
drain back into the oil pan. If you don't, the oil
dipstick might not show the actual level.
Pull out the dipstick and clean it with a paper towel or
cloth, then push it back in all the way. Remove it again,
keeping the tip down, and check the level.

When to Add Engine Oil

If the oil is at or below the ADD line, then you'll need to
add at least one quart of oil. But you must use the
right kind. This part explains what kind of oil to use. For
engine oil crankcase capacity, see Capacities and
Specifications on page 5-99 .
5-16
Notice: Don't add too much oil. If your engine has
so much oil that the oil level gets above the
cross-hatched area that shows the proper operating
range, your engine could be damaged.
Be sure to fill it enough to put the level somewhere in
the proper operating range. Push the dipstick all the way
back in when you're through.
If you have the 2200 L4
engine, the engine oil fill
cap is located in the rear of
the engine compartment
on the passenger's side of
the vehicle. If you have
the 4300 V6 engine,
it is located in the rear of
the engine compartment
on the driver's side of
the vehicle.