Jiffy Lube DIDN'T come about til 1979 so much for the 70's..as for the original poster change your oil when you feel it needs it oil and filters are cheap enough to buy..change mine every 3000 could careless what all the so-called expert's think
Manufacturers sell vehicles so....they want them to wear out quicker so you will buy a new one. I am in the auto repair industry and my experience when you change oil at 5,000 mile intervals all is well. But start doing 7,000 to 10,000 mile oil changes and the engine wears out alot quicker.oil change places want money and say 3000. dealers want money by selling u a new vehicle more often. has always been a good rule to do the first change early - say 3000. after that go around 7000
But start doing 7,000 to 10,000 mile oil changes and the engine wears out alot quicker.