What ratio of bio-diesel can you run on a Volkswagen Diesel engine?
I've been looking into home bio-diesel production, and am wanting to get a used Volkswagen diesel powered car (Jetta, Golf, Passat, etc.).
Just say I created my own home bio-diesel perfectly (like 100% how it should be done) and fill up
First off, we are talking about Biodiesel, and NOT waste veggie oil, correct? Because you don't want WVO anywhere near any diesel engine built in the last 20 years...
If you're looking at older VWs, 100% bio is just fine, so long as you're
Gone is the shared Audi look as VW distances itself away from its luxury sister company in design. Powered by a 2.0-litre Turbocharged Direct Injection (TDI) 140 horsepower diesel 
There are four trim levels – S, SE, Sport and Escape, and six engines in total. Since VW estimates that 90pc of Tiguan sales will be diesel, it's interesting to note that the engine range is split 50:50, with three petrol and three diesel engines.
While the 1.5-litre turbo-diesel is no firebrand, it is a willing little unit that provides acceptable levels of tractability from the low end of the rev range, along with excellent fuel efficiency, and has one of the quieter diesel engines.
Modern diesel engines, matched to the latest fuel-saving techno-trickery, are one of the easiest paths to greener motoring. The Mercedes — and nine other finalists — use stop-start technology to improve fuel use in congested cities.