tritonsmoon 
"My problem is that I am not understanding the point of the PCV system if it should just be vented off instead of fed back into the intake. Is this just a serious design flaw with this particular PCV system on Isuzu's part? Is it basically that the existing PCV configuration is not functioning properly (i.e. not venting or getting clogged)?
I have been changing my PCV with EVERY single oil change, and my oil consumption has not gotten any better....
Sorry for all these questions, just trying to learn this stuff so I have a solid understanding....
Thanks - Bart"
The pcv valve is used so that the gases in the crankcase get recycled (for emmision reasons). And the valve is supposed to close when there is vaccum,so it cannot suck oil from the valve cover. I cannot say that this will stop your oil consumption problem . I know that it stopped mine. I had changed my pcv valve did an oil change and within 1000 miles or so used 2 qts of oil. So it failed that quickly. The problem is more from poor design of the valve cover. I have not seen the underside of the valve cover but would guess that there is no baffle or too small a baffle to prevent the oil from being sucked up when there is a failure of the pcv valve. If I were you I would try it. I have looked at the chart in the vx manual and a pcv valve failure will cause excessive oil consumption. It will not harm your engine to try this. shawn
