I use 2 microns on my racor(500 series). The engine is a Volvo MD-30.

With a 10 some sludge will get thru..


Hanz


Wayne.B wrote:
On Mon, 16 Jul 2007 06:31:41 -0400, "Roger Long"
wrote:


"Wayne.B" wrote

I've had good luck with Biobor.

That's the stuff I almost bought. Do you just pour it in the tank before
filling?

I was buying just before I needed to fill the tank. The print on the Biobor
Jr. bottle was so small that, even with my glasses, I could only make out a
few phrases that looked like, "full protective clothing", "pre mix with
(some quantity) of fuel", etc. It was the latter that really made up my
mind because I didn't have time to arrange the necessary containers and
means of transfer.

The StarTron says that there is absolutely no risk of interaction with other
fuel treatments. (If the PRI people are correct, that's easy to believe.)
I could still try Biobor when I use up the next half tank.

Another question: Does the alge sludge get through the primary filter? I
plan to put a vacuum gauge in my fuel line the next time I open up the fuel
system. However, my secondary filter is downstream of both fuel pumps so I
can't put a gauge on that one unless it was a pressure gauge just before the
filter.


Good questions. If I still have a fair amount of fuel when I start, I
just pour in the total amount of Biobor that I will need. Otherwise I
will fill part way, add the Biobor, and resume fueling. I wear rubber
gloves when handling it. It's a good practice to wear them when
handling diesel also.

My primary filters are 10 micron Racors with vacuum guages. As long
as I keep an eye on the vacuum and swap out the Racors in a timely
manner, the secondary filters mounted on the engine stay clean. The
sediment bowl on the Racors also needs to be checked periodically.

I replace the secondary fuel filters once a year as preventive
maintenance.