| Do we really think each of theses guys has an oil refinery ? i have a bridge to sell . It is same the stuff in different bottles , why it works the same and so has advocates by brand . None are “ wrong” If you really look at the engineering in oils , Mobil 1 synthetic , or synthetic generally, came out of the severe duty that an airplane gas turbine needs, the difference is all the polymer chains in synthetic are made the same length . Natural oils vary all over the place . Consistent repeatable lubrication is the result . So despite all kinds of rain dance stuff , such as purple dye, Pennsylvania sources etc etc , Mobil 1 is the best oil if you want the best oil . Why it costs so much and is in aircraft engines, where there is extreme stress . It is engineered to be the best , Most of the other stuff is marketing hype. Related, I read a test , might have even been SAE , where they ran a 350 sbc in a Camaro until the oil showed loss of additives etc — for real -still ok but string to decline — not “recommendations “ to change it . Mobil 1 was still perfect at 18000 miles . Others had failed earlier . So we waste oil like crazy changing it all the time for nothing handing the oil co money . It turns black due to detergents holding junk in suspension as it was designed to do . Predictable performance vs temp comes from those engineered polymer chains. A better place to spend money is a real mopar oil filter , many others are junk . The reason it has to be good is modern oil change intervals (Toyota is 10 k? and synthetic ) combined with warrantee . Mopar is not motivated by profit on oil filters but by no warrantee claims on engines due to dirty or inadequate oil or poor filters . I saw the various filters cut open , you would not believe what is in some name brands that come from china now . As in roll of toilet paper . Mopar one was really good . Based on all this I use Mobil one 10-30 for 10 k miles , same $ over 10 k as other ways change filter too . This has coincidentally brought back some pretty sad 150 k mile V8 engines too , it cleans them up . lifters stop ticking etc after 10 k miles Two 4.0 jeep daily drivers since 1997 , one went 320 k other now is at 250 . Both use zero oil over the 10 k . That i cannot believe !! but true . I am sold . I do put zddp in , sort of nothing to lose on that with mechanical lifters Anyway , what one engineer thinks .. John Sent from my iPhone On Jun 22, 2023, at 9:51 PM, 'Michael James' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx> wrote:
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