Regardless of what people say, wvo will eventually lessen the life of an engine by a significant amount....they car already had a lot of miles before the wvo was introduced....wvo produces a lot more carbon deposits then diesel does....eventually the rings will start sticking and wvo will start leaking past and mixing with the crank case oil....then you start getting gunk building up in the engine....the temperature of the oil doesn't get hot enough to burn off the wvo, so more periodic oil changes are necessary....plus it is normal for an injection pump to slightly leak diesel into the oil....so wvo can enter in via the injection.....yeh I will get flamed again....no surprise there, some believe wvo is gods gift to diesel engines....and I believe its only good for fish frys