Changed my oil - went with Amsoil this time, been using Schaeffer's for almost the life of the truck but it got stupid expensive. Like $160 for a case of 12 quarts... While under the truck doing my visual on my back, I noticed that one of the 2 downpipe bolts was GONE. I have SPD downpipes with the built in adapters and the top bolt on the passenger side was gone. Called SPD to get the size specs of the bolt, off to the hardware store to get a replacement... All good now, i did use some loctite (medium) but it probably won't do much since it gets so hot...