Hello, I have a '09 Challenger SE with the 3.5L V6 engine. Engine has 125k miles on it. Was thinking about using Mobil 1 10W-30 High Mileage Full Synthetic Motor Oil, but I'm not sure if previous owner was using conventional oil. Please let me know your recommendations. Thanks in advance!
Mobil 1 synthetic is a premium oil. I use it in my SRT. Its high mileage formula would be ideal for your 125,000 mile 3.5 engine.
I only use Amsoil at the moment, but also have used Royal Purple. Any of the oils listed above should work fine.