Years ago, early to mid 90's i had a 85 isuzu hatchabck i miark. around 95, when i was 20, i started doing my own oilchanges. I used fram extra guards, and on 2 oil changes a year, ide my oil light would light up! Of course, back then, i didnt knwo what was goin on, just that wasnt good. so ide put valvoline oil treatment in and the light would go off.
Moving forward, 2000-2006. I had used frams again on and off, about 3 times over the past 7 years on a 95 plymouth neon. in ALL cases, immediatly after doing a professional oil change myself, the oil ligth would come on! Ide change it too a fram extend guard, ac delco, supertech, ect any other brands, never an issue. I learned, its was jsut with the fram extra guards, on 2 different cars, immediatly turning the key after an oil change, the oil pressure light came on. I had also replaced the oil pressure switch as well behind oil block, for the record. wont buy another fram extra guard ever again. the extend guards never had an issue with though.