Hi all , is dexos oil a must to put in a L77 ?
GM and GMH would like you to believe it but the ACCC doesn't.
Dexos certified oil is just a way for GM to con owners into thinking that is the only oil good enough for their engines and they do this so as the oil companies/brands have to pay royalties on their sales to have the Dexos Certification.
Of couse GM says it is to ensure that the correct quality oil is used but in truth there are or at least used to be oils that were far better quality that didn't have certification but the market demand by naïve owners is forcing the holdout brands to now get the certification so they can get the sales.
Any good quality oil that is near the specified rating for the engine will do just as good a job and be aware, GM has to prove the oil you used caused a problem with your engine, you don't have to prove it didn't.
Just think what would happen if GM said brand X wasn't a good enough oil and the legal fight that would start with the owner of brand X to protect their reputation.
That fight wouldn't happen as GM wouldn't want it known in the public domain that Dexos certification is a con.
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