Is it worth it to use a by-pass filter system on my 99 dakota 5.2l, 5sp, 4x4. Presently has 52k miles. This vehicle sees about 10k/yr, when driven daily about 40 mile roundtrip with about 1-2 miles of stop-n-go each way. evenings and wknds rarely any highway use. vehicle might sit for 5 days at...