The engine-off filtration concept begins
with a hollowed oil drain plug.
Engine oil drawn from the sump is
ultimately returned to the top end through
a special brass fitting attached
to the oil fill cap.
A very long note about oil changes...
The above design can make an oil change very easy... and represents a simplified method for tapping into the oil supply for a bypass/pump install. There are many parts to a bypass filter/pump install and the pics above shows a simple method to access the oil for the system.
If you can install the system... your oil drain interval on a non-turbo vehiclecan surpass 20- 40- even 60000 miles,
based on an occasional comprehensive oil analysis.
Most AMSOIL users opt for once-a-year oil changes... and never tap the full potential of the AMSOIL Bypass Oil Filter.