metzer.hr
METZ44
I am switching to synthetic oil in my f350 sd. I just put in mobil 0w40 and I am placing an order in on Amsoil tonight. The only oil I could find was the 0w40 and I have read some of u guys have used 0w40. My plan is to use Amsoil 5w40 when the order comes in.My 6.0 is hard to start when the temp drops, I plug my truck in on the colder nights. Will I be ok with 0w40 for 1k miles until I make the switch to Amsoil 5w40.