I ran my Dodge S46 with Perkins 4.236 on vegetable oil for some time.

All you need to do is pour pure vegetable oil straight into the tank - It doesn't matter how much diesel is already in there, you can use it in any ratio with diesel.

At this time of year, however, you need to be careful - Vegetable oil is much more viscous than diesel, and added to this, at low temperatures (around freezing) it solidifies.  This happened to me one March morning up in Lancashire - My Dodge started fine and drove for about 400 metres before giving up.  Had to bleed the system all the way from the tank to the injectors to get it going again which is a bit of a pain.  If you lived in Canada you would notice similar problems with diesel itself which starts to solidify around -20 degrees celcius.  Increasing the amount of diesel in the diesel/veg oil mixture can help, although is not failsafe.  Some people put a cup of petrol in too which is supposed to keep things liquid.

The only real solution is to fit another fuel tank for veg oil (Or only use veg oil in the summer).  There's loads of information on the net about converting diesel vehicles to run on veg oil.  These conversions are all just another fuel system for the vegetable oil, some with elaborate intercoolers which heat the vegetable oil with the hot coolant as it comes out of the tank to make it less viscous.  Most systems incorporate a switch which allows you to switch from diesel to veg oil and back again when you wish.  With most two tank systems it is recommended that the vehicle be started on diesel then switched to veg oil then before stopping the engine switch back to diesel and let it run for a bit before switching off.  This is so that diesel is left in the pipes and injector pump rather than veg oil which could solidify and therefore not flow.

As an aside, you may think it is a convenient coincidence that your diesel engine will run essentially without modification on vegetable oil.  However, the diesel engine itself was developed and prototyped by Mr Diesel on peanut oil.  It was not until after Mr Diesel's strange and suspicious death aboard a ferry in the English Channel that oil companies found that a fraction of oil from the fractionation process used to make petrol worked equally well.  The only reason your diesel engine needs modifying at all to run on vegetable oil is because during the past 80 years it has been optimised to run on the less viscous fuel commonly known as diesel.

Try it, you won't do any damage (except if it is very cold, or your Dodge is actually a petrol).  One other thing I noticed about running on veg oil was that the vehicle takes a while longer to start - With straight diesel my Perkins starts almost instantly on turning the key - With veg oil I found that I would have to keep the starter motor turning and the engine would gradually pick up speed and start burning the veg oil, sometimes it could take 15 seconds which is probably not very good for the starter.  Also a lot of white smoke issues from the exhaust when starting on veg oil, and more white smoke is evident at traffic lights too - I've heard that to optimise a diesel properly for veg oil a slight retardation of the timing is required - Perhaps this would help.

Did you try runnng yours on vegetable oil?

If so, how did you get on?

Ran my dodge bus all last year on veg oil. You can buy it at the garages in Denmark, and in Germany it's refined slightly and called Bio-diesel. I fitted a split system using the big main tank for the oil + a smaller tank for deisel which i used for starting then switching to the oil when the motor was warm

It worked ok + THEORETICALLY causes no problems, though there were warnings connected with Lucas injector pumps

P.S. Dont think there was any connection, but my injector pump locked up and completely trashed my motor six months later ??????????

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Ran my dodge bus all last year on veg oil. You can buy it at the garages in Denmark, and in Germany it's refined slightly and called Bio-diesel. I fitted a split system using the big main tank for the oil + a smaller tank for deisel which i used for starting then switching to the oil when the motor was warmIt worked ok + THEORETICALLY causes no problems, though there were warnings connected with Lucas injector pumpsP.S. Dont think there was anyconnection, but my injector pump locked up and completely trashed my motor six months later ??????????

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Thank you for your rapid response and the information that you went the two-tank route.  What did you say when the pump trashed the engine, or can’t you put that into print?

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Has anyone tried used cooking oil? – Ex-chippie? - Ex-greasy spoon?    I can get all I want, and get thanked for taking it away.

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What's - "ffice" etc - anyone?

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I think that's what happens if you compose you're reply in Microsoft Word (Office) and then cut and past it into aimoos reply window.

Heppens to me as I hif too cheque my speling a lot!!!!

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Reply to : jammydodgerWhat's - "ffice" etc - anyone?I think that's what happens if you compose you're reply in Microsoft Word (Office) and then cut and past it into aimoos reply window.Heppens to me as I hif too cheque my speling a lot!!!!

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I reckon that

http://autoinfozone.com/vegoil.html

is a good site to find out how to run your Dodge on old chip oil.

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From the way I read it: -

·    Old chip oil and old greasy spoon oil are the tops

·    Filter it

·    Add 3% white spirit (the stuff you use to gloss paint brushes rather than alcohol)

·    Leave it a week.

·    Pay the tax to the Inland Revenue.

·    Save a pretty penny

·    Save the world

·    Make a chippie happy