new owner of MB 300d (1981) - PeachParts Mercedes-Benz Forum

winglessrose · #1 05-22-2006, 05:21 PM

Just bought a 1981 300d for a bargin price of $1.00!!! It has been running on an 50/50 wvo/disel mix. What is the proper way to mix the fuel so car runs? What kind of cooking grease should i be using? i know it needs to settle so it's clean when i mix it, but i'm not sure how do go about that process. We are new to WVO & bio-disel engines, so we don't want to ruin the car. It runs great. Once we charge A/C, will stop driving out 98 pontiac sunfire!!! Will it hurt the engine to go back to straight disel after it's been running on a 50/50 mix for the last 4 years?

iNeon · #2 05-22-2006, 05:27 PM

You don't *have* to run vegetable oil in the car.

My suggestion for you is to run it on petrol diesel until you do more research on cooking oil type fuels. Many of these cars are testers for folks who wish to run free fuel ( stop claiming its about the environment, would youall? Its about trying to cheat the system, nothing more.)and many have been ruined in the process.

Don't let your misunderstanding of this take another nice old Benz off the roads. It'll cost you more in the long run if not done peoperly!

phidauex · #3 05-22-2006, 05:30 PM

There isn't really a 'proper' way to do WVO/diesel mixes, because its not a process thats approved by anyone, MB, trade organizations, the ASTM, etc. I only recommend it for people who are comfortable with the operation of a diesel engine, comfortable being tinkerers, comfortable with the possibility of causing a big problem through the tinkering, and who have the time/energy to fix problems they may create, so, just keep that in mind. WVO can be done right, but done wrong, and it can cause major engine problems.

You need the oil to be water-free, free of particulates (10 micron filtration would be ideal), and then mixed well with clean diesel fuel. Shaking will mix it well, just make sure your containers are clean and well sealed.

And please use the search feature on this forum, its been around for a long time, and I can almost guarantee that you haven't got any questions that haven't already been answered 10 times. Do a lot of reading and searching for information, and if you still have questions, let us know.

peace,
sam

edit: iNeon beat me to it. But he's right, you may wish to run on petrol diesel for the moment, until you do the research required, and you have a crystal clear idea of what you are doing. It would be a shame to damage the engine on your first run, because you hadn't gotten enough info yet...

Larry Delor · #4 05-22-2006, 05:31 PM

Congratulations on your purchase!

I would agree with running it on straight diesel for a while. Why? So you have a baseline as reference. This way, you know for sure what the car can do performance wise, how it sounds and otherwise behaves normally.

Then, once you know what it is and isn't supposed to do, you can experiment however you like - this way, if something doesn't seem right, or goes wrong, you may get a better handle on the problem.

Have fun!!