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Where is my trunk space?
It is a nice system. It is more complicated than I would like. The 'Return on Investment' is much longer on than single tank. There may be no ROI if the car craps out first, not necessarily due to WVO.
I bought a $700 300D with 300K+ when I first started out on WVO. My philosophy is that it was a car/money I can afford to lose. Installed a $150 home brewed 1 tank kit and have done 35+K miles WVO on it. At the time, it did not make sense to invest $1K+ for a 2 tanks system. It still does not. The 300D is still running strong but is on diesel/WVO blend now as it is my daughter's daily driver in NoCal. This car ROI is many many time over the purchase price and is still counting.
I am toying with a home-brewed 2 tanks system. This is the only 2 tanks system that I would contemplate. The idea is to put a washer bottle under the hood filled with diesel, purge the system with diesel using an electronic timer during cold start. When the car uses up the diesel in the IP, fuel filter and the lines then it will suck WVO from the stock tank. I have all the parts pulled from JY and it is a matter of finding the time to experiment with them. With this simple 2 tanks system, my plan is to have no switching valves, just a simple one-way check valve. That is to stop the diesel going into the stock tank during purging.
In essence, most people would recommend 2 tanks but I find 1 tank acceptable based on my personal experience and warm climate in SoCal.
Good luck.
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