The previous owner had some after market gauges inside the cab and now there seems to be a leak from that after market oil pressure sending unit. Having the stock plug sent from Merlin at St. Charles. But, 2 quarts down in two weeks? I had the oil topped off (after a very recent oil change) and was told the oil pan is leaking. So, got the VX at a shop and they are looking at it. Hopefully that is all it is. I am almost at 85k miles.