Howdy, actually, the big one is referred to as the secondary filter, and as you may know, it does not spin on. (many here have learned this the hard way)
anyway to answer your question, there are 2 schools of thought here regarding fuel filter changes...
1. if it ain't broke, don't fix it.
2. follow the scheduled maint.
I have some major fungus issues, I have changed the primary filter about 8 times now, (everytime the car starts to feel sluggish) but I have yet to change the secondary. Anyway, I carry spare filters at all times w/ the tools to change it.
cheers,
RObert
anyway to answer your question, there are 2 schools of thought here regarding fuel filter changes...
1. if it ain't broke, don't fix it.
2. follow the scheduled maint.
I have some major fungus issues, I have changed the primary filter about 8 times now, (everytime the car starts to feel sluggish) but I have yet to change the secondary. Anyway, I carry spare filters at all times w/ the tools to change it.
cheers,
RObert