mixing viscosity
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Joined: Jul 2001
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From: Charlotte NC
mixing viscosity
i just bought 4 qts of mobil 1 5w30 for an oil change. i have about a .25 qts left of castrol 10w30...could i just add .25 of 10w30 to the mobil 1 synthetic 5w30? is there any problems with mixing viscosity?
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