We in the UK have been using Bio fuel for quite a while now, the first problem I had was in 2017, when the temperature dropped to freezing ( zero to minus 1) I had the bio content drop out of suspension, it was so thick I could scrape it out with a piece of flatbar, I could run on the fluid part of the diesel if I skimmed it off the top of the Bio part. The other thing I discovered is that gas oil ( thats our red diesel) is not the same as road diesel. Road diesel is to spec EN590, I dont know what EN spec gas oil is. I was told if you have a new machine and you have fuel injection problems, the warranty will be void if you run on gas oil.
The next problem I had was in 2020, same again, (I think by this time we were up to 20% bio), again the bio dropped out of suspension but by this time I was adding additives, anti bug, anti wax, gas oil conditioner to make it burn better??. all this at extra add on cost to the basic gas oil. I asked the supplier the question, if the additives are necessary should' nt they be added at source, therefore by my thinking the basic gas oil is not fit for purpose, so another money making scheme. Anyway our Government in their wisdom decided that from April 2022 all construction plant would have to use road diesel, and their thinking was that the construction industry would "absorb" the cost, at present our road diesel at the filling station is £1-90 is per litre so no one can absorb the cost
(I believe gas oil is around the 85 pence per litre so quite a price difference). So the bio part has cost everyone dearly for the problems it causes.
Good luck all
I have not had problems with road diesel so far, fingers crossed!!