First let me say I'm a long time reader of these forums but have never posted anything before, I've read several threads about this but I still have some questions about what I'm seeing and what is Considered normal.
I have a silverado with a 5.3l engine, the mileage is unknown on the motor (it's been replaced and was used). Motor runs excellent, doesn't use oil, doesn't smoke, excellent oil pressure, no knocks or ticks (other than the famous cold start piston slap that almost all of these ls based motors have and I've read a lot about that to confirm what I'm hearing is normal). The engine did have a lot of sludge buildup in the lower end when I got it, I cleaned the oil pan inside and put it on with a new gasket when I got the motor. I checked the sludge buildup in the pan when I got the motor for any metal or metallic debris and it looked clean in that regard. I just did my second oild change with Mobil 1 5 30, full synthetic (acdelco filters) and noticed that I have metallic particles suspended in my oil, in every drop of it, they're non magnetic, not enough of them to be clumped or swirled as I've seen before on motors with bearings failing, could this be from the sludge being cleaned out and releasing all the trapped particles it's had packed in with it? This was a short oil change as well, only 1000miles and the oil was black and the filter had caught a lot of sludge crud. The filter pleats only contained three extremely tiny visible particles that weren't sludge, only three and they were extremely tiny, that could have been contamination from cutting the filter so I'm not that concerned about that right now as much as I am the particles or dust throughout the oil, couldn't really capture the oil with shiny particles in a picture though. Does this just sound like it's cleaning out and I suppose stirring up all the buildup in this engine or something else, Thanks everybody for your time and replies
I have a silverado with a 5.3l engine, the mileage is unknown on the motor (it's been replaced and was used). Motor runs excellent, doesn't use oil, doesn't smoke, excellent oil pressure, no knocks or ticks (other than the famous cold start piston slap that almost all of these ls based motors have and I've read a lot about that to confirm what I'm hearing is normal). The engine did have a lot of sludge buildup in the lower end when I got it, I cleaned the oil pan inside and put it on with a new gasket when I got the motor. I checked the sludge buildup in the pan when I got the motor for any metal or metallic debris and it looked clean in that regard. I just did my second oild change with Mobil 1 5 30, full synthetic (acdelco filters) and noticed that I have metallic particles suspended in my oil, in every drop of it, they're non magnetic, not enough of them to be clumped or swirled as I've seen before on motors with bearings failing, could this be from the sludge being cleaned out and releasing all the trapped particles it's had packed in with it? This was a short oil change as well, only 1000miles and the oil was black and the filter had caught a lot of sludge crud. The filter pleats only contained three extremely tiny visible particles that weren't sludge, only three and they were extremely tiny, that could have been contamination from cutting the filter so I'm not that concerned about that right now as much as I am the particles or dust throughout the oil, couldn't really capture the oil with shiny particles in a picture though. Does this just sound like it's cleaning out and I suppose stirring up all the buildup in this engine or something else, Thanks everybody for your time and replies