2002 SILVERADO 4.3 V6





I've been wanting to start modding my truck! but I can't until this issue is fixed... or I know more about it.



The previous of owner was a hardcore Mobil1 Full Syntheitc fan. I bought it switched to PenZoil 5-30 Blended Synthetic. I bought the truck with 137K, changed the oil to PenZoil a few days after. Some from 137k to 141k I had a front seal leak, I fixed it. So after changing at 141k, I had a Check Engine Oil level light come on, oil was low, topped off, this was at 143k. I do notice some oil resdue/stains at the rear main seal.. but it looks small. There is no smoke either.




So... Is it burning oil, is it normal, is it the rear main seal, or a little bit everything.. And if it is the rear main seal can I just use some addetive?




I love my truck, even if it's a V6 it's badass, I come from a Ford V8 loving family and they keep talking ****, but my truck is always turning heads... I gotta get this issue fixed.