You can, but your vehicle will sustain long-term engine damage even if you live in a warm climate.  Even with a one tank system you are still injecting cold oil into a cold engine upon startup.  The piston rings are not sealed at this point and the mixing of oil with crankcase oil can be detrimental to the health of any engine.

MPG depends upon the vehicle.  On vegetable oil a vehicle should achieve a very similar MPG to operation on regular diesel fuel.  MPG in diesels also vary with winter additives.

Vegetable oil has a naturally higher cetane level (the delay ignition time of a fuel, the higher the cetane value the shorter the delay) then petroleum diesel but is thicker and therefore contains a lower energy content.  This balances out with vegetable oil having a 2% loss in power.  This should be unnoticeable to the driver and if your car can pass the 100 mark on the odometer on diesel then it will on vegetable oil as well.

The system is essentially doubling the components of fuel system.  This includes the changeable fuel filter element on the fuel filter housing.  Just like you would change a diesel fuel filter every few thousand miles, you will need to change the vegetable oil fuel filter as well.

Most of our customers have agreements with local restaurants to pick up their used oil.  There are also bulk oil suppliers for those who wish to purchase new oil.  Warehouse supply stores often stock five gallon containers of new oil at competitive pricing to diesel.

At anytime while driving you can switch to using petroleum diesel/biodiesel (depending what you have in your other tank). 

In theory, yes.  We have converted many makes and models from various years.  There are some that we recommend more then others and some that we are more challenging.  Please contact us for more specifics.

It depends on the dealership.  We've worked with dealerships who have sponsored us and whose techs work on veggie vehicles and we've had some who make frivolous claims that vegetable oil was clogging the air intake with sulfur deposits.  Talk to your dealer before assuming the warranty will be honored.

We provide kits to allow diesel vehicles to run on straight vegetable oil commonly referred to as SVO and in Europe as PPO (pure plant oil).  Used vegetable oil from restaurants is referred to as WVO (waste vegetable oil).  Biodiesel is a diesel fuel chemically derived from vegetable oil.  Often biodiesel will have a number following it.  This number indicates the percentage of biodiesel to diesel in a tank or pumping station.  For example, B20 is a 20% biodiesel and 80% diesel blend.  The use of biodiesel does not require a two tank system, though depending on the situation there may be additional modifications needed to the vehicle's fuel system.

Vegetable oil is an organic compound.  Though the edibility of oil does not have an effect on usability, the oxidation and breakdown of the oil is a concern.  Oil should not be kept past a couple months.  If it stored it should be in sealed containers, not in direct sunlight or extreme temperatures.

Depending on the vehicle and customization of the kit it can vary from novice to expert.  Having general mechanical skills is definitely a plus.  Our kit comes with detailed instructions.

If your engine heats up then our system heats up.  The system harnesses the engine's waste heat to heat the oil.  If the engine is hot so is the oil.

We use only TIG welded aluminum tanks, heaters, filters, and valves because vegetable oil reacts with steel, copper, and rubber.  We have fully automated systems with auto switch over, auto purge, and pressure and temperature sensors to ensure proper system use.  We design our own custom fuel filters and in tank heaters from scratch engineered to have the most efficient heat transfer capabilities.

We suggest you filter to 2-5 absolute micron rating.  We also recommend that you dewater your oil before using it in your vehicle.