The Bio muncher

mr tickle · 26-07-2012, 23:05

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MMMMM lovely homemade Biodiesel pumped straight from my garage into the car.

makeitfit · 26-07-2012, 23:27

Have you got a good supply of oil then? We just cant get enough and have been buying bio from Swansea. Can you make us a couple of thousand litres maybe ?

96terrano · 27-07-2012, 01:12

love the number plate

supergnome · 27-07-2012, 07:56

Its hard to find used cooking oil for free. the big boys have all but cornered the market with buyback of oil supplied. Nearly all pay about 27p/L. If you've got a good supply keep quiet about it. Best of luck. David.

jims-terrano · 27-07-2012, 09:27

I'm sure we have members on here that have used either Veg Oil or Bio (Home Made or Not) for a long term. Has anyone had any problems due to using it? you read about horror stories of the rubber seals in the fuel system or oil escaping past the piston rings and thinning down the engine oil or over filling the engine oil.

Jim

kitchenman · 27-07-2012, 13:53

I tried 40 litres in my mav 60/40 veg/deisel,
Cut the tick over down from 700 ish to a little over 500 so everything shuddered even when hot on tickover

No guts, lower MPG

So I have gone back to 100% deisel, still some diluted veg in there so not back to normal yet, but improving, tick over nearer 700 now.

arcascomp · 27-07-2012, 14:35

Veg is thicker than pump diesel so a couple of things can happen, even in the 'summer' time.

As it's thicker, the pump is sucking harder and that means if there is any weakness in the fuel lines, there's a higher chance of it sucking in air which will always make the engine run rough. Also as it's thicker, it doesn't pass through the fuel filter or the mini filter so well, so if either of these is even a bit congested, the engine will suffer fuel starvation.

Adding 15-20% petrol to veg will bring the viscosity back to that of pump diesel, but will then have the effect of lowering the cetane level a bit. Adding a cetane enhancer such as vegiboost will bring that back to 'normal'. Petrol also stops the darn stuff turning into margarine in the winter time.

As long as you get the veg cheap enough, then it does work out cheaper than pump diesel and definitely if you can get WVO. However, with biodiesel, the viscosity issues go and the risk of having veg oil gumming the works also goes. Note to self, must finish building my bio processor!

26-07-2012, 23:05	#1
mr tickle Senior Member Join Date: Nov 2011 Location: Pontypool South Wales Vehicle: Terrano 2.7 TDI LWB 2003 Posts: 168	The Bio muncher [IMG][/IMG] MMMMM lovely homemade Biodiesel pumped straight from my garage into the car.

26-07-2012, 23:27	#2
makeitfit Senior Member Join Date: Apr 2008 Location: on the beach WEST WALES Vehicle: Maverick TDi BLACK mmm Posts: 15,136	Have you got a good supply of oil then? We just cant get enough and have been buying bio from Swansea. Can you make us a couple of thousand litres maybe ?

27-07-2012, 01:12	#3
96terrano Senior Member Join Date: Jun 2010 Location: Dumfries and Galloway, Scotland Vehicle: Nissan Terrano 2.7TD LWB Posts: 8,024	love the number plate

27-07-2012, 07:56	#4
supergnome Senior Member Join Date: Sep 2010 Location: Isle of Axholme Vehicle: T2, 2.7 TDI 2002 lwb Posts: 955	Its hard to find used cooking oil for free. the big boys have all but cornered the market with buyback of oil supplied. Nearly all pay about 27p/L. If you've got a good supply keep quiet about it. Best of luck. David.

27-07-2012, 09:27	#5
jims-terrano Senior Member Join Date: Sep 2004 Location: UK Posts: 12,965	I'm sure we have members on here that have used either Veg Oil or Bio (Home Made or Not) for a long term. Has anyone had any problems due to using it? you read about horror stories of the rubber seals in the fuel system or oil escaping past the piston rings and thinning down the engine oil or over filling the engine oil. Jim

27-07-2012, 13:53	#6
kitchenman Senior Member Join Date: Jan 2011 Location: Essex Wescliff Vehicle: maverick 1994 2.7 TD Posts: 1,278	I tried 40 litres in my mav 60/40 veg/deisel, Cut the tick over down from 700 ish to a little over 500 so everything shuddered even when hot on tickover No guts, lower MPG So I have gone back to 100% deisel, still some diluted veg in there so not back to normal yet, but improving, tick over nearer 700 now.

27-07-2012, 14:35	#7
arcascomp Senior Member Join Date: Jan 2012 Location: Edinburgh, Scotland Vehicle: 96 Mitsubishi Challenger! Posts: 775	Veg is thicker than pump diesel so a couple of things can happen, even in the 'summer' time. As it's thicker, the pump is sucking harder and that means if there is any weakness in the fuel lines, there's a higher chance of it sucking in air which will always make the engine run rough. Also as it's thicker, it doesn't pass through the fuel filter or the mini filter so well, so if either of these is even a bit congested, the engine will suffer fuel starvation. Adding 15-20% petrol to veg will bring the viscosity back to that of pump diesel, but will then have the effect of lowering the cetane level a bit. Adding a cetane enhancer such as vegiboost will bring that back to 'normal'. Petrol also stops the darn stuff turning into margarine in the winter time. As long as you get the veg cheap enough, then it does work out cheaper than pump diesel and definitely if you can get WVO. However, with biodiesel, the viscosity issues go and the risk of having veg oil gumming the works also goes. Note to self, must finish building my bio processor!