Running 5% sump oil with diesel to extend it?

If you are that poor you are willing to try it you should probably sell your 4 by - for instance the money you spent on becoming a member would be as much as you would save extending 800 litres by the method you mention. However a 4by will run on sump oil and blow heeeeps of smoke. (trust me I have seen it)

I think you will get 2k’s down the road, and the first cop that you see will put a yellow sticker on your car for excessive smoke.

Maybe you should look into making some Bio-diesel and then mix it in, Cheaper, the car will preform better and it is a chit load better for the environment than burning sump oil.

Just don’t declare it to the TAX department the gov makes enough money from taxing fuel.

Ist, I have not tried it.
2nd, can't see the problem as this is standard practice on some of the modern BIG trucks. To save down time and disposal of old sump oil the oil is constantly being bled into the fuel system and new sump oil is drip fed into the sump. Only need to change the filters and not the oil at service intervals. If it is good enough for the big rigs (with full factory warantee) then surely its ok for small trucks.

If you spend $2000 a year on fuel, why would you want to save 5% ($100) and risk your engine not to mention the environment

Sounds like a big risk for a small return, possibly.

I'm no technical expert.

I'd seek professional advice. Not totally sure this is the place to look.

Cheers,

Jim.

I think it time you sold the 'ol girl, and looked towards something lighter more economical and cheaper :)

Get rid of the roof rack! It'll save you 5% fuel usage!!

Reduce your average speed by 10km/h to reduce fuel usage by 5-10%.

Get a larger capacity tank, and fill 'er up only where fuel is cheap(??)
I have noticed that you can save 5c/l around Melb metro form station to station.
(Dunno? about other areas??)

The last tip would be...... to drive 40(odd) Km less on a trip!
@ 8l/km that will save you 5 litres.

And non of my tips involve using any harmful additives :))

*sarcasm...off!*

Hi John, I think you'r idea may have some merit, as a mobile mechanic I produce about 3000lt of used oil per year,it always seems a real waste to hand it over to the recycler for nothing. I would be prepared to experament mixing it with diesel in my own vehicle but it would have to be properly cleaned first.I have heard that putting used oil through a cream separator will bring it back to clear yellow oil . In the very early days diesels ran on the likes of coal dust and heavy oil. There is a workshop heater that burns sump oil and runs completly clean without smoke it all depends on the combustion temp. Food for thought!
Regards Ken.

What a tight ar$e. If you want a much better rate of economy try these things:

1. Take out all unnescessary crap like golf clubs, dogs, wife, kids 5% savings
2. Inflate tyres to 45 5% savings
3. Drive with light foot up to 10% savings
4. service injectors 5%
5. Take off roof racks up to 15%
6. Ad acetone according to the advertised formula save up to 25%

This will be better than putting that dirty crap into your engine and our environment.

I have done all and are getting about 30% extra kms per tank in all of my 1HZ toyotas. It really works.

To learn about acetone try this site http://www.lubedev.com/articles/additive.htm

Thanks everyone.

I know it does sound like a stupid idea.

And as people point out, carbon build up is a major concern.

I do run 45psi in the tyres, only use the roof rack when I have too, and currently get about 9.5 to 10l/100k with a light load on the highway sitting on 90/95.

But last weekend I took 80litres of oil to the dump, a years worth of oil changes.
Around town I don't think it would work, but on a long run, with a good warm engine and a bit of load it may.

Looked at making my own biodiesel, bu heating a hundred of litres of oil around the house is a concern. Also, knowing what you get from restaurants etc, it is not the best oil to start with. 80% or so palm oil, maybe 5 to 10% lard, and various other oils.

The mining industry burns a lot of waste oil in their diesel equipment mainly to use the oil as thousand of liters of waste oil is generated per week, Cummins diesel have been marketing the Centinel oil management system for years, this system is designed to extend service intervals by drawing sump oil out of the engine putting the oil through a hydraulic type filter, approximately 3 micron then into the fuel tank (most fuel filters are only rock stoppers at 12micron). One machine I am familiar with uses approximately 400mls per hour the sump is topped up continually from a reservoir and the reservoir filled weekly. The engine burns 120 Ltrs per hour or about .33% the ratio would increase by the end of the shift as the fuel level drops and the oil is continually injected into the tank.
Recently told a story by the local Cummins rep that one of the local shire councils were looking at buying a stand alone Centinel system to blend waste oil with the diesel, they balked at the $15,000 price tag and said they would continue doing it the way they have always done it and that’s by poring it into the diesel tank and mixing with a broom stick.
Engine oil actually burns hotter than diesel due to its higher calorific value and it actually improves the lubricity of the diesel.
I have heard of blending up to 10% most systems aim for a maximum of 3-5%.
Stew