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.
but im getting off track a standard oil change is up to 5 qts of oil for a set price for example a ford wind star may take 5 qts of regular oil for lets say 29.95 and if you wanted synthetic oil that would raise it to 49.95 for 5 qts that's including the filter now a Diesel car or truck could take up to 15 qts of oil so for either oil change any ...