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Since my speedo/odo does not work, I change my oil by the calendar. The intervals are based on average use, and have a fudge factor built in for any extra use. I change every 5 weeks, which, under normal circumstances works out to about 2500 miles. This insures that even with extra trips, etc. the oil gets changed every 3000 miles or less.
My current problem: I got forgetful/lazy and did not order Mann filters from FCP, and I have none on hand. Oil change is really due this coming weekend. The car should have less than 3k miles on it since last change, probably about 2400 to 2500. What do you think would be better, to put it off until next weekend (Oct. 31), by when I can have a case of Mann filters here, or to do it this coming weekend (Oct. 24), and use a Purolator or whatever filter? Even if I put it off, the car should only have 2800 to 3K miles on it by the time I change it .
Maybe I obsess over these kinds of things, but frequent oil and filter changes are well proven to greatly help keep a car running well.
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Scott Cook - 1991 745T, 1985 RX-7 GSL-SE, 1986 Toyota Tercel (Don't laugh, it is reliable, faithful AND gets 41 mpg!)
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