Best New Diesel Car or Truck for MPG and WVO

Hi, What's the best new diesel car or truck for mpg that can run on waste vegetable oil? I know the vw rabbit was a good one and have heard its still the best, but I'd imagine there's a new diesel car or pickup that gets better mileage than the vw rabbit pickup which got around 50 mpg. Anyone know anything on these new diesels that can also run wvo? thankyou

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