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I would not go as far to say it was a "scam". GM does not want na in and out west Texas discount oil change place buying low cost bunker oil and putting it in the cars for their $39 oil change special.
I don't know enough about dexos to know if GM is charging a royalty. Maybe, is it a few cents a quart? maybe.
Alls I know is Joe Average pays $50,000 for an expensive XYZ and wants the cheapest longest drain interval oil (note I did not say lasting or working) possible that will pour into the motor.... that is what Dexos IMO is trying to stop.
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Forged short block, large duration sub .600 lift Cam Motion cam, 7200 RPM fuel cut, Pray Ported Heads, 3.85 pulley D1X, stage II intercooler, DSX secondary low side, DSX E85 sensor, Lingenfelter big bore 2.0 pump, ported front cats, 60608 Borla, LT4 injectors, ZL1 1LE driveshaft and Katech ported TB, ported MSD intake, BTR valvetrain, ARP studs, ProFlow valves, PS4 tires.
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