My 1999 Saturn does not use any oil. My 1993 goes through a quart every\n500 miles. I put dye in the oil and checked for leaks but did not find\nany yet, but my mechanic said we should look again in a few days. (There\nis a wet patch in my driveway) Meanwhile, the car does not appear to be\nburning any oil. And several years ago, I took a compression test and all\nwas fine. I changed my PCV valve for the first time last week, but used an\naftermarket brand. I have not noticed any improvement, and have seen from\nmessages that an original is better.\n\nDo you think this could cure my problem? Why do the early Saturns have\nthis 'drinking' problem?