RoyF wrote:
Is it gas or diesel? On my 2008 F350 6.0L diesel (same engine as 2006), oil changes intervals are 7,500 miles for normal usage, or 5,000 miles for heavy usage.
If the vehicle is used primarily for towing (as mine is), then the 5,000-mile interval is recommended.
He has an E450, probably a class C motorhome and with a V-10 engine. He is asking for the transmission oil change interval, not an engine.
When we had a Class C, at 10,000 miles, I changed the transmission to Mobile 1 synthetic oil and added an auxiliary external transmission oil cooler.
Since oil change are cheaper than rebuilding transmissions, I went with a 50,000 mile filter and oil change interval.
Ken