2010 BMW X5 Xdrive35d twin turbo diesel. All emissions equipment deleted, about 380hp and 550lb ft with tune. 210,000 on vehicle, 10,000 on Mobil Delvac 15w40 and a Hengst filter. Driving was done over the past year in Las Vegas, a mix of city and highway. About a quart of make up oil was added over the interval. I experimented with a couple different cone air filters during this interval and had the intake opened up multiple times, which could explain the silicon reading. Also have had a consistent minor loss of coolant for the past 20kmi with no obvious external leak, which could explain the sodium.