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Re: GM dexos oil. High mileage engine question
Posted to Technical Theory Forum on 9/2/2020 1 Reply

1) Use a dexos 1 approved product 2) Do NOT use STP or any other oil supplements

The SAE viscosity categories are pretty big/vague ranges. They don't do a good job identifying dynamic viscosity

The dexos 1 approval assures the proper dynamic high HTHS visco... Login to read more.

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