If the oil isn't properly heated before it goes in, it doesn't atomize properly or burn completely. It ends up forming a gummy substance that makes the piston rings stick and causes the engine to lose compression. There is also the matter of the excessive viscosity causing higher stresses and faster wear in the injection pump and injectors. We've also seen corrosion issues but I'm not sure if those happen with new veg oil or only with WVO.

Ask Cooljjay about the effects of veg on an engine.

__________________
Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.