I can't comment on the Clio engine, but engines such as the XUD have long proven track records of running unmodified on high concentrations of veg oil. I personally have added a coolant based heat exchanger to mine purely because it's a cheap and easy modification. The way Rob drives his cars round the yard anyway, I highly doubt they last long, even running on derv :rasp:

That sliver car is running on 100% veggie oil that is not even been filtered lol I even remember seeing a chip go into the tank lol. That model came with a heated filter standard but its still going
Benefits of having lots of the same cars. Any thing that gets broken can be fixed bodged or replaced
I can get de-watered and 1 micron filtered WVO for 35p a litre. on the clio I've got a heated filter exchange to keep the viscosity of the WVO down to pass the pump easier.
Any other problems that come up from using thicker fuels such as WVO, engine oil are not going be to hard to fix. Main thing being pump still only a 30min job.
What kind of Clio do you have Rob? When I was looking at the Mk2 PH1 1.9D, they all seemed to have Lucas?
Mk1 Clio van to move stuff around the yard. and to store stuff in. It didn't come with a Bosch pump i had to get one
running on pure pure wvo requires heating to maintain a usable viscosity. That aside, even on older engines this can cause issues with injector pintles, and high pressure pumps due to the oil being heated (whereas fuel usually aids cooling of the pump).
including the drop in economy you inherently with wvo, the inital cost of making it usable, the cost of it, and the cost of collecting it, the cheapest option is to just by red.
Legalities aside of course lol hence I only used it on my non road vehicles.
There is 'down' sides to buying red. If I had a tank here of red and a tank of WVO.
With WVO I can use 2500ltrs in my road going cars a year. but with red I can't use any on the road.
You would have to dewater WVO anyway (or you should be

), and I found engine oil easier to filter than WVO due to it having no fat content. Find a place that keeps their engine oil in a large tank. It will have been collected over a very long time so should be very well settled. You could take some oil from the top of the tank and it should be very clean. Not saying it will work, my eninge didn't like it, but it seems popular in the states so it must work in some engines.
What engine did you try running on engine oil ?
It is best to de-water the WVO if the pistons tried to compress water the con-rods would not like it

But a tiny bit isn't going do any harm ( in my pieces of s**t any way)