Since I am running a WMO mix, I feel the need to add a second fuel filter in my 93. I got an old 6.9 filter head and mounted it on a piece of steel, so I could use the existing bolts to mount it forward of the stock filter.

It was suggested that I use a 7.3 filter head instead, so that I could also have the fuel heater that comes with it.

Anyone care to give me their thoughts, as to what would be the better choice? My original plan was to use a NAPA 3403 on the 6.9 filter head, instead of paying $25-35 for the 7.3 filters.

Gary

 

the fuel heater will help with running the wmo i would think.how are you filtering your wmo by the way i got a bunch of it and dont want it to go to waste

 

Ok this uneducated guy thought a wmo was an insurance term is it like wvo if not what is it.

 

what is wmo

 

You and me the only dummies on here lol.

 

waste motor oil

 

Burn it in a shop heater.

 

EMD, this is what I have:





Your 6.9 engine has the heater around the line coming from the lift pump to the filter head, you can reused that if you carefully bend the line below and above the heater so its top end is now where the inlet of the new filter head is - I'm still using the stock steel line from there, it's about perfect fit. I have my add-on filter head wire spliced in my stock one, it seems to work fine.

I would also recommend that you use a 7.3 filter assembly, you will have a water separator with it, and an additional heater, but the best part is that you can stack the filters as the 7.3 is a 12-micron and will get rid of the large chunks, while the 6.9 uses a 6-micron filter that will clean the fuel even more.

 

7.3 filters are expensive I would wrap the extra filter with a coolant hose if I felt the need I dont see where you would need heat if your mixing it enough.

 

Well, I got the fuel flowing through my old transmission cooler in the bottom radiator tank, it warms up pretty nicely without getting crazy hot like WVO needs to be.

I'd recommend the 7.3 primary and 6.9 secondary filter as the first one will clean up the larger stuff and the second will filter down the smaller particles, so with WMO the filters will likely last longer and filter better.

 

I've been running no more than 3 gallons of WMO to a tank with no mods. at all.
Might be hurting my motor but at 372K I'm not too worried.

 

If it turns out to be a problem run it in the dodge dont be mean to a ford.

 

I wouldn't do something like that to a Cummins! I'm not an animal!

 

I just thought that cummins was tough enough to handle it thats all.

 

I just can't MAKE myself do anything slightly harmful to this truck. It's been used as a truck should but it's also been meticulously cared for since brand new.
If it was just your average 18 year old Dodge I would probably run just about anything in it.

I guess you could say the Ford is "tough enough" to run WMO in because it hasn't caused me any problems yet.