Is it the mind playing tricks, or do most engines (at least mine, with at least 100k on all of them) go way better with more than 50% veg? Beyond 95% veg they can lose a little pep (obviously if the supply is limited with standard lines in cold weather that's an issue, as is cold oil dragged through a filter) but there is the added benefit of loads of extra low-down torque - there is a steep hill which I can never manage in third, yet on veg it's never any bother. In comparison with running good veg, on diesel all engines seem to fade when asked to lug hard.
