cooking oil cheaper than diesel

Ramblingboy42, chill out man. We're only offering offering up advice based on what we've read ourselves. Yes, you didn't say it was used and I mistakenly assumed it was because that is the oil most people use, because it is cheap or they get it free.
So, considering you think the advice people on this forum give is up the ****, I expect you'll be going elsewhere to get "proper" advice.
This is a community minded forum where we try to offer advice to help each other, not abuse each other,but obviously you think your above it. :2up:

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Originally Posted by ramblingboy42

its brand new cooking oil not used or I would have said that, and the td5 was designed to run on almost any combustible fluid that can be injected ala low enough viscosity,(do your homework first) ffs no I don't need another job to have more money...this forum's advice is up to **** sometimes.....having the availability of the oil I was simply asking what it should be mixed with to get viscosity to good levels.....the td5 will run on it beautifully for its entire life without problems Nigel!....Mools what are you saying? youre giving completely unqualified unfounded advice...don't do it.

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I actually concur with mools on it.

I run anything I can get my hands on in the any of the landie diesels upto and including the tdi300

I sat down and punched through some numbers on the cost of various fuel system components VS the cost savings per tank and worked out the mean time between failure rate of various components AND the cost of a worst case scenario failure (mechanicing cost only I didnt factor in the "what if the failure of that component at a certain critical time causes the vehicle to go out of control burst into flames as it careens out of control through an orphanage burning it to the ground prior to coming to a rest in the local cute puppy pound and exploding" type stuff) I also factored in a an additional 2l/100KM to compensate for a degredation in performance caused by accelerated wear on the fuel system.


Ignoring all the cost benefit stuff and going straight to worst case remembering that The td5 runs a 75 PSI fuel rail into injectors that provide the seal between this fuel line and the combustion chamber. Pressure control is achieved at the return end of the fuel rail and the fuel pump can potentially deliver fuel at about 150psi assuming nothing else fails and the pump is delivering to a zero flow condition

The worst case scenario for this is with 2 injectors failing open is the combustion pressure from one cylinder will over pressurize the fuel rail forcing excess fuel into the other cylinder through its open injector. Left long enough this will cause piston failure (if the head doesnt let go first) Ignoring this as the most immediate and likely cause of a runaway engine the piston failure will have combustion gasses blasting into the sump overpressurising the engine, the first place these gasses will exit the engine is through the crankcase ventilation system once that starts happening you will have lubricating oil being fed back into the air intake via the turbocharger air inlet trunk. And theres a runaway.

Whats the cost of replacing a TD5? How quickly can you do it? whats the impact of having your vehicle off of the road for that long?

Given that the cost of TD5 parts is down and diesel is up it might be nearer the balance point if the final 2 parts of the cost/benefit ratio are in your favor (how fast and the impact of not having the vehicle) if you can get enough distance between failures.

Just as an example.... (and remember I dont pay mechanics labour so if you cant do the work yourself you need to factor in those costs)

at current prices in the tdi 300 everytime I refil the tank I save enough money to replace the fuel filter and one injector. If I dont blow any injectors Every 8 tanks I can afford to replace the fuel injector pump with a second hand untested unit and every 14th tank I can replace it with a reco off shelf item.

My current savings on a full tank of fuel is to the tune of $120 for a complete refill. (80ish L ~$1.60/l)

When I did the math for the TD5 the cost for replacing all the injectors, the filter and the fuel pump was a shade over $6k and fuel was around the $1.20/l mark


but as you say, the engine will run bueatifully on whatever you chuck in it for its entire life, but remember that that once bad batch of fuel that sticks a pair of injectors could well mark the end of that life... the same way as a lifetime guarantee on some cheaper tools is only valid till you break the tool then its life is over.

best of luck to you if you decide to run it on vege oil.

Dave, I'm talking brand new oil here with no solids or contaminates, brand new food grade, suitable for human consumption(if you enjoy drinking cooking oil).....all I want to know is what I should use to lower its viscosity...........

you shouldnt..

research the breakdown pressure of your oil and then decide if you should still run it.

Its been covered several times before so heres the summary

the injection pressure of a td5 is the same as the upper limit of perfectly made uncontaminated biodiesel, any contamination or imperfections will cause you problems.

That said

For fozzy and the tdis I cut it with

nothing, diesel, avtur, avgas, petrol, metho, white spirit, shellite, engine oil, ATF, turps, kero, paint thinner, pretty much anything I can get that I can make it seem like it might start and run in the test diesel.

Use this link to do further reading.... though the North American market is / was pretty low on diesel engine info.
You may find the answer you want...:eek:


General Blending Discussion - Forum

From past experience (myself and others) I'd be a bit reticent to 'advise' anyone to use Straight Veggie Oil of ? source in a Landrover td5 engine...:angel:

Any other indirect, mechanically injected Jap engines, - Yes. No hesitation, 'straight', warmed or blended.

just adding my 2 cents...... I'm a forklift mechanic & get plenty of silly operators filling the hydraulic tank with diesel.....i drain the system, put it thru twin 100 micron filters and run in my fork rental fleet, no issues. They are all Toyota forklifts with 1DZ or 2Z 4 cyl 3469cc, no issues... have been doing it for over ten years... on another occasion, I almost ran out of diesel fuel in country vic, had a new 20litre- 32 grade hyd in the back, put half in and got the 50kms to the servo!!!!!!!!! and that was in my 2010 transit!!!!!!!!!!! :o:o:o

Distillate is a light oil with additives like butane to improve startability, and rust inhibitor. Diesel engines will run on anything that you can get in there and ignite. Finely powdered coal has been used, also corn starch, but I don't recall with what or any success. Racor used to make filtration and blending systems for fleets that cleaned and metered drained oils from your workshops into your bulk fuel supply. The air police apparently banned this because of the possibility of increased pollution from whatever nasties might be in the waste oil.

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Originally Posted by ramblingboy42

... the td5 was designed to run on almost any combustible fluid that can be injected ala low enough viscosity,...

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That is incorrect. It has been reported that TD5s have been tested and can run on AVTUR / Kero. It has then been incorrectly assumed that it can run on these fuels without significant/accelerated wear.

Kero is the standard minimum lubricity (accelerated wear) test fluid for diesel fuel systems.

And that ignores what happens in the combustion chamber.
The attached image shows diesel pistons after ~3000 hrs on diesel, 300 hours on biodiesel and 5 hrs on straight, clean, filtered canola.
https://www.aulro.com/afvb/

I think you're wasting your time commenting on this one guys, RR42 obviously doesn't want your advice, hasn't thanked anyone for their inputs and has only insulted some of us who have concurred with your sage advice and is likely to now complain that you've taken the discussion off topic. :angry2:
Very interesting photo isuzurover - thanks :D

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Originally Posted by isuzurover

That is incorrect. It has been reported that TD5s have been tested and can run on AVTUR / Kero. It has then been incorrectly assumed that it can run on these fuels without significant/accelerated wear.

Kero is the standard minimum lubricity (accelerated wear) test fluid for diesel fuel systems.

And that ignores what happens in the combustion chamber.
The attached image shows diesel pistons after ~3000 hrs on diesel, 300 hours on biodiesel and 5 hrs on straight, clean, filtered canola.
http://www.aulro.com/afvb/attachment...rent_fuels.jpg

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I remember that pic, its been around for a while, If I recall there was a sequence of them new pots, after X hours and then run to failure.

Im almost scared to find out whats on the top of the pots in fozzys old donk and the tdis Ive got going.