I've personally done wvo in a 04 vw tdi bew engine with greasecar kit in 2020. The prep is a lot of work, i live in canada so it took longer to heat up. i had to strain the oil. heat it up to boiling temperature. IF not done it will gum up your injectors and wont run properly. if your doing it with a stock f250 you'll need to replace the rear tank, its not capable of handling it for long periods of time. The heated fuel filter part for the f250 will save you lots of headakes.
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