79Mercy is correct about motor oil. As in any compression engine a percentage of the fuel does not combust and makes it way down to mix with the motor oil.

As WVO is not a petro based product the WVO will contaminate the motor oil quicker then a petro based fuel. This can lead to loss of lubrication and excess acids in the motor oil.

This is where the increase in preventative maintenance comes in (more frequent motor oil/motor oil filter changes) that so many studies of Veggie based fuel systems expound on.

Out of curiosity, what's the failure mode here?

To further the discussion or degeneration thereof, lets start with a big YMMV, and warning that the discussion may be hypothetical:

Risk: Bad compression / blowby
Failure mode: stuck rings/ hone loaded w/ uncombusted wvo
Mitigator: 2 tank, preheat, maintain injectors

Risk: Burning oil
Failure mode: Oil control rings coked/loaded from contact w/ uncombusted WVO.
Mitigator: 2 tank, preheat, maintain injectors

Risk: Coked injectors, bad spray pattern
Failure Mode: contact w/ uncombusted wvo
Mitigator: 2 tank, preheat, maintain injectors

Risk: Corroded/abraded/schmutzed up injectors, bad spray pattern
Failure mode: Contaminants in VO (water/solids) react with/interact with injector components.
Mitigator: Filter, dewater

Risk: IP damage
Failure Mode: Corrosion, abrasion, cavitation. Contaminants in VO (water/solids) react with/interact with IP components.
Mitigator: Filter, dewater

Risk: IP damage
Failure Mode: Excessive stresses due to pumping hi viscosity fluid
Mitigator: 2 tank, preheat.

Risk: Rats in fuel storage
Failure Mode: Curious, hungry
Mitigator: Physical barriers, scent repellents, predators, occupation of space.

These are some of the big caveats, anyone care to contribute in a similar format?

__________________
CC: NSA

All things are burning, know this and be released.

82 Benz 240 D, Kuan Yin
12 Ford Escape 4wd

You're four times

It's hard to

more likely to

concentrate on

have an accident

two things

when you're on

at the same time.

a cell phone.

www.kiva.org It's not like there's anything wrong with feeling good, is there?

I only know him from his slanted views and the misinformation that he posts on this board. NO professional mechanic would make some of the statements that he does because they know better.

Our moderators do a fine job here and until someone dies and makes you a moderator, I could care less about your complaint about my perceived personal attacks.

__________________
You can get farther with a smile and a gun than you can with just a smile.

1984 300D
1985 300CD
1980 300SD
1993 SL500

I only have sixteen cars running WVO that I have first hand access to so it isn’t a wide enough base for any conclusive scientific proof. I posted because the questioner asked about harm caused by using WVO and no one can provide proof that it does, including you.

What oil analysis would that be? I use WVO in my fuel tank and Mobil one in my crankcase.

"I know diesel fuel isn't going to harm the engine."
I agree. Diesel doesn’t harm our engines. Neither does properly filtered and dry WVO.

"Ummmm, I never passed off any picture of a cooked intake valve, even though thats what WVO causes."
Don’t get your knickers in a twist since you are not the poster that I was complaining about but you seem to have similar views on the subject and you offer no proof either. If you can show me an intake valve that was coked up due to using veggie oil, I will eat that valve in your presence. Before you get excited about old Tirebiter eating a valve, I must ask you how fuel of any kind would get deposited on top of one of our diesel intake valves. Only filtered air hits the top of the valve since the fuel is injected into our cylinders. Valve coking is normally caused by a bad valve seal that was wiped out because of a worn valve guide or a broken valve spring.

"I suggest you get your facts straight before you post."
My facts are based on my own first hand information. Unless you have proof of damage then I must think that your conclusions are based on either hearsay or clairvoyance.

__________________
You can get farther with a smile and a gun than you can with just a smile.

1984 300D
1985 300CD
1980 300SD
1993 SL500

Yeah but not all the WVO gets burned, some of the deposits get into the engine oil and dillute it... You should know that....

It doesn't matter how many times you filter WVO you still wont remove the harmful acids in the oil. The only way to know the acid levels is to have a lab run a test on the oil.

Why do you think that new car manufacturers are still designing car to run on diesel fuel and not veggy?

__________________
1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg

correct, but a 2 tank system won't fix that because no matter how many time you heat it, you still won't remove the fatty acids from the oil.

Same reasons as stated before

I will aggree to this one, but its isn't only the higher viscosity of the oil causing problems, its the acids.

__________________
1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg

The answer to that is apparent. Big Oil doesn't sell veggie oil. Plain & simple as that.
Same reason they attack the biodiesel industry.

__________________
1984 300SD Turbo Diesel 150,000 miles

OBK member #23

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(='.'=) This is Bunny. Copy and paste bunny into your
(")_(") signature to help him gain world domination

I've been testing WVO in Mercedes 617 diesels, and have found no conclusive evidence that WVO damages engines, if properly filtered, etc. AND even if it did, coke the injectors, it would take many miles and gallons, wiht diesel hovering around $3.00/gallon your fuel costs are around 10¢ per mile. Drive WVO 20,000 miles equals savings of $2,000 that could be put toward repairs caused by "inferior" fuel.

__________________
Closing the store
Benzbonz.biz on your smart phone or tablet.

You could very well be right, mercy, but no side seems to have any solid data for things like corrosion. I just choose to be optimistic about it and hope that any corrosion is insignificant. To my knowledge, by the way, acid is only a problem with wet oil. If it's properly dehydrated, there's no water for the acid to dissolve into, so no acid erosion. I could be wrong, I don't have any specific sources to back that up, but that's what I believe to be correct.

__________________
1983 240D 3.0T 4-speed manual, now sold

1989 Subaru GL Wagon 5-speed Touring Edition

Several years, and several thousands of miles on veggie and blends.
No problems yet.

Mostly pre used soybean oils.

Filter and dewater using a centrifuge.

We have the same cars, I have a 87 300SDL with a greasecar kit on it with a 30 fphe. I own a company called Green Conversions. www.austingreenconversions.com This really isn’t the forum to be asking about wvo, because a lot of the owners wouldn’t think about moding the cars they own at all and that’s fine. But understand that you can go to greasecar.com and read up on what you need to know. The greasecar kit is wonderful for our cars. I was greasing a 98 Jetta TDI before it was hit by a truck, and then I moved over to my 87 MB.

But the MB’s are great cars to grease. Feel free to check out my website or email me if you have any questions.

__________________
Professional greasecar installer
Austin TX


98 Jetta TDI with grease car kit + veg-therm (totaled)
87 MB 300SDL running on B99 / greasecar kit + 30 fphe
www.austingreaseguys.com

The main reason is there is not enough veggie oil to support a mass market. There is about 12 gallons of WVO per person per year. If everybody was doing it, it would be less than a fillup a year per person.

Biodiesel is far better for the mass market since once a diesel engine has proper fuel line material and seals, then any blend from B100 to Bzero is usable.

__________________
Ron Schroeder
'85 300 Turbo Diesel 2 tank WVO
'83 300 Turbo Diesel 2 tank WVO
Some former WVO vehicles since ~1980:
'83 Mercedes 240D
'80 Audi 4000D
'83 ISUZU Pup
'70 SAAB 99 with Kubota diesel
'76 Honda Civic with Kubota diesel
'86 Golf
Several diesel generators
All with 2 tank WVO conversion
LI NY

Also proper de-watering removes most of the acids along with the water in most of the oil sources that I have used over the last 30 years.

__________________
Ron Schroeder
'85 300 Turbo Diesel 2 tank WVO
'83 300 Turbo Diesel 2 tank WVO
Some former WVO vehicles since ~1980:
'83 Mercedes 240D
'80 Audi 4000D
'83 ISUZU Pup
'70 SAAB 99 with Kubota diesel
'76 Honda Civic with Kubota diesel
'86 Golf
Several diesel generators
All with 2 tank WVO conversion
LI NY

Pardon me.In England they sell a diesel oil thats vegetable based.This oil pervents some of the mixing issues with fuel on engines with weak compression.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

now I have to disagree about the blanket statement that diesel fuel will not harm an engine. just as I disagree with the blanket statements made that WVO will harm an engine. either fuel needs to be clean AND dry. wet, dirty diesel can kill an engine just as fast as wet, dirty plant oils.


and while it is not a Mercedes,( but it is German, and diesel) and not specifically for USED cooking oil, here we have a factory built, two tank equipped plant oil burning farm tractor. complete with warranty from the manufacturer. I really doubt they would market this if they thought it was going to cost them millions in warranty work(replacing IP's and engines)

it is only a matter of time before auto makers follow suit(lets hope). then all we need to do is get past our lovely emission regulations for the USA.

peace, grease and goodwill towards others..............

__________________
1984 123.193 372,xxx miles, room for Seven.

1999 Dodge Durango Cummins 4BTAA 47RE 5k lb 4x4 getting 25+mpgs, room for Seven.