Hi guys, I've posted on this forum before and found it very helpful. I have a 93 HB 5 speed 4x4 with the Ka24e. I've had this truck for about 5 months now and I have replaced a few things. At one point it overheated on the road so I replaced the water pump and thermostat. Ever since then I've been burning oil and recently have been seeing blue smoke come out of my tailpipe on start up. Plus I've been checking my oil consistently with the engine cold and finding oil levels dropping. I have always used super tech 5w 30. Just recently I changed to super tech "high Mileage" 10w 40. It still unfortunately has blue smoke on start up. Why is my truck burning oil? Does it have something to deal with my truck overheating in the past? Is it an internal seal? I am 16 and this is my first vehicle ( I paid for it) and I really like it. I am in auto shop so I have lots of useful tools available to me, so any suggestions will help. Is it possibly a valve guide seal?