2000 LS400 smoked for a short duration while on the freeway
So I just drove from Las Vegas to San Diego with no issues. Then on my drive home almost at the last incline before the drop into Nevada I notice whitish/greyish smoke coming from my cars exhaust under load. I immediately slowed down and got over to the slow/semi truck lane until we finally made the decent part. As soon as we hit the downhill part no more smoke at all. Pulled into a rest stop to check out the car. No leaks, no CEL lights, no odd sounds, no loss of power nothing. The cars oil is roughly only 1500 miles or so old. Started her back up and not one more sign of smoke. I did just have to pass a car and honestly got it up to 120mph in all fun but that was like a half hour or so before anything had happened. I had my cruise control set to 80mph. Heck it was barely 85* out so it wasn't like the car was even struggling. On my trunk and rear bumper looks like unburned fuel or oil smoke (reminds me of when a turbo is kinda burning oil or running rich)
Drove her to work today and still nothing. Gonna drain her oil this weekend and check it out. Have you guys ever experienced this before? Crank case full? EGR possibly? My car has had all basic maintenance done including timing belt, gaskets etc. Any idea what would cause this on the vvti v8?