Before this big, bad pickup arrived, manufacturers largely used upgraded versions of their light-duty trucks to handle heavy-duty work. The 1999 Super Duty was a separate model line with its own style and hardware underneath.
You can run a conventional oil 5K miles but you should be able to run a synthetic oil 7500 to 10000 miles. Royal Purple API-licensed synthetic engine oils allow motorists to travel as many as 12,000 miles as the recommended oil change interval.
How long can you go between oil changes with synthetic oil? I have a Toyota Solara that I bought when it had low mileage on it. ( It&#39;s a great car ) I drive long distances with it and have put probably thirty thousand highway miles on it since I got it. It&#39;s in the high fiftys now.