Ford, Volkswagen and Porsche, for example, recommend oil changes every 10,000 miles. So does Toyota on several engines, including the Prius' 1.8-liter four-cylinder and the Camry's 2.5-liter four-cylinder. BMW says owners can go up to 15,000 miles between oil changes (with synthetic oil).
âHighâ fitness women ran the mile in nine minutes or less; âmoderateâ fitness women ran it in 10 minutes and 30 seconds or less and âlowâ fitness women needed 12 minutes or more to complete the mile. Run for Life states that a 10-minute mile rate is good for beginners; the goal is to complete 3 miles in 30 minutes. If a 10-minute mile rate seems out of reach, start with a 12-minute rate and then work downward.
The most important factor determining run speed over a long distance is the runnerâs fitness level. An elite athlete may complete a mile in less than five minutes, and the world record at the time of publication is three minutes and 43 seconds, held by Hicham El Guerrouj. Someone new to running, using a run-walk system to build her endurance, may need between 12 and 15 minutes. Most runners are close to the median of these two extremes and should be comfortable completing a mile in seven to nine minutes.