Well what my sales guy told me is that he worked in the GM factory for 12 years and they changed their personal vehicle oils at 1000-1200 km then at the proper intervals after that. He said the factories are very dirty and to get shavings and crap out of the engine. I am thinking that has some truth to it, but he knew i wouldn't be going there for an oil change as it is 6 hours from where i live so not sure.

Take it with a grain of salt i guess?!?!?!?!?!?!?

 

I have always changed it in the spring, and again in the fall, when it gets parked. All I have ever used is full synthetic Motorcraft or Mobil1.

 

Mobil1 for me. Full Synthetic

 

Oh no, the special additives are dirt, shavings and crap! Who hired miners to work in the factory?!?!?!