I actually drove the car today and it felt fine, so I think whatever it was smoothed out whatever settled while the car was sitting. I do have another problem with my vegetable oil system, however. I used the greasecar kit which includes a separate filter that has a knurled bolt at the bottom that one may unscrew to let out water and sediments that have settled at the bottom. It said I should check it every week. I just checked it yesterday and oil came out so I thought everything was fine and I just closed it. I was driving on the oil today when I started hitting air. It wasn't that much, it stalled and I had to pump the injection pump by hand and crank it a bit, but is that normal after you drain the filter? I don't want to wear out my starter by having to go through that every week.