At 103,000 miles or so shortly after I first purchased this car I purchased a Single Tank kit from PlantDrive.com. Including the Vormax filter housing and the VegTherm 12v in-line heater. The kit arrived quickly in the mail and I began the install.
A single tank system typically uses your original/stock fuel tank for the WVO or WVO blend and all additional filtering/heating happens typically under the hood. The PlantDrive system is in my opinion one of the better kits out there from a single tank perspective. I have read many good things about Elsbet but at a price of over $2,000 and shipping vital parts of your car overseas put its into a category all to its own. My experiences and this blog are from a more hands-on, low-budget but still give a damn perspective. At the time of my purchase the complete cost of the conversion was around $900.
My uncle and I did the conversion in the late fall in southern Nevada. The weather was in the 70’s during the day dipping into the low 40’s at night. The conversion was straight-forward and only had a couple hurdles which we overcame when we read the instruction manuals better. The single Tank Plant Drive system is basically hands off once it is installed. No switches or in-cab gauges to watch. I ran this conversion for approximately 4,000 miles.
Advantages of single-tank:
Low-Cost, less parts/switches/hoses/wires and only one fuel tank
Ease of use, in warm climates
Easier/faster Install
Does not clutter your engine-bay as much
I switched to Dual-Tank after driving on the stock single-tank plant-drive system for approximately 4,000 miles in November/December of of 2007. In a single tank system the colder it gets outside the more normal #2 Diesel you need to blend into your fuel. Typically if it is getting into the 20’s and 30’s at night it is recommended you blend up to 50% normal diesel into your fuel. Keeping it blended well is a challenge in itself and I recommend you put a couple gallons of diesel with a couple gallons of veggie into a gas can and shake it vigorously before putting it into your tank. Yes it will still stratify or seperate out over time it works MUCH better then just adding them to your tank pure.
I drove the single tank kit through northern Nevada, Utah and Wyoming during December. Using only about a 20% Diesel blend. To this day most people I talk too think it was crazy I did not get stranded considering how terrible the weather was (blizzard conditions, below 20 degrees, strong winds) But I essentially did not shut the car off for 36 hours. I made it with out any issues and arrived in Denver Late one night. The next few days I got my education about Single-Tank in cold environments. The Denver winters are brisk, below 20F at night and into the high thirties during the day. Even at a 50/50 blend I was having terrible trouble starting my car.
Most of this is because my car does not have a block heater, and I am certain the glow plugs are faulty/weak. The car is from California and a block heater was never installed. After replacing the Glow Plugs and buying a oil pan heater I was able to start the car but it was still very difficult. In Denver I met up with Kirby, Owner of GoGreenEarly.com. A friend of a friend contacted him when I was having trouble getting my car going. Shortly after meeting I decided to go check out his shop and his SVO Systems. We soon worked out a deal in exchange for my web-design services he would help me design a new Dual tank system for my car, effectively allowing me to use almost any kind of grease in almost any climate.
This my hybrid system was born, I am now running a custom Dual-Tank system designed for Dumpster fill.
Advantages of Dual-Tank
No blending of fuels, using almost 100% WVO even during winter
Works in even sub-zero winters
Allows you to keep your stock Diesel system mostly unmodified
Dirtier Grease can be used if your grease tank has easy access for cleaning
This is only a smart part of the pros of using a Dual Tank system, suffice to say it allows you to burn much more WVO in much worse conditions. However Dual Tank is a considerable amount more expense and takes longer to install. A good system parts and labor can and almost should costs upwards of 2,000. Granted this is almost as much as the Elsbet single tank system. But even that system requires you to blend and in fact I am uncertain if that system is even approved for WVO at this time (I think it is designed for Bio Diesel) Though many people use it for WVO.
Sorry for all this information to be a bit dis-jointed and confusing I am trying to sum up months of information into simple posts I have time to write! In the follow posts I will go into more detail about my current system and its operation.