WVO Update: I changed my fuel filter. I'm glad I did

kenbw2 · 2025-04-19 02:04:56

Oh dear

Admitedly it's been a while since I last changed it, and you're meant to change it soon after switching to VO

Does anyone know what this is? I'm hoping it melts when the fuel is warm when the engine is running, or that it's the gunk that's cleared out when first running on oil for a while

The fuel in the reservoir under the filter was perfectly clean. This gunk was just on top. I wonder if it's condensation/water that forms when it cools?

Either way, I'll be keeping a closer eye on this one

RegW · 2025-04-19 14:31:01

That reminds me of me old chip pan mate! lol

it looks like emulsification to me due to the water content in the tank

Last edited by RegW (2025-04-19 14:36:07)

kenbw2 · 2025-04-22 14:32:16

50 miles later it's looking clean.

It did occur to me that my first batch of oil was some very dirty stuff, whereas my new supply is a lot cleaner. Let's hope it stays that way

RegW · 2025-04-23 11:37:14

That looks better if a wee bit yellowish
Is this SVO or are you adding a percentage of diesel?

kenbw2 · 2025-04-23 18:03:21

It's straight WVO. So it's had food cooked in it and I've filtered it

The oil is darker than you'd expect normal clean veg oil to be, but I do have about 10% diesel in there atm too

kenbw2 · 2025-06-20 01:29:55

Checked my fuel filter again after 2 months and... oh dear

What's odd is that the printed lettering on the filter seemed to come off with the gunk which suggests two things:

- That the gunk and the print have become one. Acidity? Solvent? Or maybe a coating on the filter has dissolved?
- It also tells me that the gunk isn't readily circulating into the fuel system - if it was it wouldn't have stayed so intact

But I do need to understand what's going on here. Water? Acidity?

I've ordered a PH test it to see what it might be

RegW · 2025-06-20 14:24:37

Oww!
I'd be concerned at what may be happening elsewhere.
You may not get the same concentration of solids elsewhere but I suggest at least
using a lower ratio of WVO to deisel.
90/10 WVO to deisel is too much IMO, even pukka biodeisel will only have a
20/80 VO to petrochemical deisel ratio at most and that's with properly processed vegetable oil

Last edited by RegW (2025-06-20 14:27:23)

kenbw2 · 2025-06-20 14:42:04

I doubt it's the ratio that's the issue - I used to run 100% SVO on this and previous vehicles with no issues, no buildup

But I agree, it makes me wonder what I'm not seeing

I've been looking into it and apparently WVO differs from SVO in something about fatty acids which need to be "titrated" out. Which I knew was needed for biodiesel, but not WVO

https://biopowered.co.uk/wiki/Titration

If you make biodiesel from fresh, unused vegetable oil there is no need to titrate the oil. This is because unused oil contains little or no free fatty acids, this allows base weights of (5 grams per litre of oil for NaOH and 7 grams per litre for KOH) to be used in the biodiesel reaction.
Used vegetable oil will contain free fatty acids in varying amounts depending on how, and for how long, it has been used.
Free fatty acids play no part in the biodiesel reaction and need to be removed. This is done by adding additional catalyst with which it will react to form soap. The soap is later removed as part of the production process.

Casper · 2025-06-20 22:23:13

How does the filter work. Down the middle and threw the paper then into the pump? If so, is it clear and still working. Your picture looks like its just taking the paint/print off the top flacking. If that is not going through the filter then why not bin the whole filter and housing for inline filters? Add a prime bulb and away you go. You can see instantly when it clogging or disintegrating and if you carry a few spare then its an easy fix no?

My convoy (Mk6 Transit Engine) filter housing is quite renowned for stuffing up. I wont buy another when mine goes, so i have a bag of filters like this link waiting to bypass the feed and return

https://www.ebay.co.uk/itm/114656769655

kenbw2 · 2025-06-21 15:51:19

The bad news is what you see there is the clean side of the filter. It comes out of that hole and out of the housing,

This is the dirty side:

I've replaced the filter again but my concern isn't really the filter per se. It's what might be happening after the filter, in the pump and injectors

OAT · 2025-06-22 18:30:09

Mnnn, honey!

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#1 2025-04-19 02:04:56

WVO Update: I changed my fuel filter. I'm glad I did

#2 2025-04-19 14:31:01

Re: WVO Update: I changed my fuel filter. I'm glad I did

#3 2025-04-22 14:32:16

Re: WVO Update: I changed my fuel filter. I'm glad I did

#4 2025-04-23 11:37:14

Re: WVO Update: I changed my fuel filter. I'm glad I did

#5 2025-04-23 18:03:21

Re: WVO Update: I changed my fuel filter. I'm glad I did

#6 2025-06-20 01:29:55

Re: WVO Update: I changed my fuel filter. I'm glad I did

#7 2025-06-20 14:24:37

Re: WVO Update: I changed my fuel filter. I'm glad I did

#8 2025-06-20 14:42:04

Re: WVO Update: I changed my fuel filter. I'm glad I did

#9 2025-06-20 22:23:13

Re: WVO Update: I changed my fuel filter. I'm glad I did

#10 2025-06-21 15:51:19

Re: WVO Update: I changed my fuel filter. I'm glad I did

#11 2025-06-22 18:30:09

Re: WVO Update: I changed my fuel filter. I'm glad I did

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