Upon getting the car back, the car's fuel economy is notably worse and the car is more sluggish.
Reviews of GENERAL MOTORS engine oil
9 votes
GM recommended 5-30 pre 2019. Post 19 they changed to 0-40. Reason is emissions. Do a Google search and you'll see there is alot of skuttlebutt out there about using thinner weight oils and the lack of protection.
E terceiro, tu tá condenando teu motor com esse óleo, anulando qualquer possibilidade de reclamar com a GM quando essa correia esfarelar e arrebentar, por permitir que terceiros coloquem um óleo completamente fora da especificação exigida pela montadora.
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