Fifth (extra) O ring is much larger than one on dipstick - that seems more like the smallest on on the end of the stack. Extra one is same size as one just below the filter.

In pic 1 is largest and 4 is smallest. Think #2 is the extra one.

Is the hose bracket necessary ?


Is the whole oil filter cap available? Like to have spares of plastic pieces. Bit large for a 3D printer.