wabbit
SDD Junior Member
Hi All: I am a new to this forum, I have a 2006 F350 Lariat SD with a 6.0 Powerstroke Diesel. I drive between 12-15,000 miles a year, towing a 4 Horse aluminum GN trailer. Since new I have been using Amsoil 15-40W heavy duty synthetic oil. I go 15,000 miles between oil changes and change the oil filter every 7,500 miles.