Harry’s trusty NPR 300 Isuzu is still going strong after more than 400,000km on the clock. Image: Alf Wilson A trusty NPR 300 Isuzu driven by owner-operator Harry Roberts has more than 400,000km on the clock and is still going strong. Harry has owned the 1996 Isuzu for about a year and said to the best of his knowledge it had never had a replacement motor during its long life. “I do my own maintenance and changed the oil the other day and it run…