The Sentra had been leaking engine oil for the past few months. Not too much to be an environmental disaster (I hope not) but enough to leave unsightly black oil spots on the ground. Whenever I visit a car shop, I ask mechanics to look for the source but to no avail. Some recommended that I get an engine wash to make finding the leak easier.
Last week, I had a complete wash: body wash, under wash, and engine wash. I then gave it a week for the oil to leak out then I had it checked at a car shop. They found that the leak was at the oil sending unit (it’s actually sends oil pressure readings). I’ve had it replaced before but that was before the engine swap so it seems I need to change it for the new engine. I had it replaced (for P1,830).
I hope that was the only problem. But so far, the car doesn’t seem to be leaking oil anymore.