General X15 information

[Hermjeji]

Quote: your average fuel mileage every 10,000 miles is ...

less than 5 MG -- Change your oil every 8,000 miles or so.

5 - 6 MPG -- Change your oil every 10,000 - 12,000 miles or so.

6 - 7 MPG -- Change your oil every 12,000 - 15,000 miles or so.

7 - 8 MPG -- Change your oil every 15,000 - 18,000 miles or so.

8 - 9 MPG -- Change your oil every 18,000 - 22,000 miles or so.

above 9 MPG -- Change your oil every 22,000 - 28,000 miles or so

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I've seen these numbers so often on this site, what's a good rule of thumb for engine hours to miles conversion? Running PTO based operations (dumps) so we change our oil between 250 to 300 hours. The more I think about this, the more I think the intervals too long. We are under 5MPG consistently. Might hit 6 on a good day.