There's so many ways this can go wrong and so few ways it can go right. If you pour enough time money and effort into WVO and don't make any mistakes along the way, you might not kill your engine. There are a few people that do this successfully over the long term but I think the majority just end up as parts cars on Craigslist that are "WVO ready yay!" I'd rather just buy renewable diesel and never have to worry about it.

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CENSORED due to not family friendly words