I've been in manufacturing for close to 30 years, customers get what they pay for. You negotiate 20% off the cost, we either pull resources out of the process till we make a profit or do extensive testing and grade each item on a spectrum within acceptable tolerances, otherwise we go out of business. Top paying customers like Mopar get the product that passes within the top spec of the product range, places like Walmart get the low end of the scale...and possibly a higher failure rate.
All products will have the same spec. Just like comparing a Palmettos State Armory AR15 to a Daniel Defense DDM4, both meet the same Mil spec but one is clearly held to a higher standard than the other.
Products like oil will have a recipe that will be taylored per specific customer and cost point, tires could have different compounds, layups or even a final balance that isn't quite perfect but still within allowable tolerances. Oil filters could be made with different quality metals or possibly just run through the crimper at a high line speed that naturally comes with a higher failure rate. There are many ways to cut manufacturing costs or provide chaeaper product options, I'm just giving a few examples.
The better a companies reputation, the less they manipulate these compromises and sometimes it just matters who's in charge at the time. Manufactures these days are at the mercy of their QC departments. We had a shady Quality Control manager at one facility and it cost us millions to replace inferior product manufactured under his watch. I was part of the team who re-engineered the entire product line afterwards and we went from having one of the lowest grade products on the market to one of the best. Same facility, same product, same spec.