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The first number is the weight. So you want 10w(weight)30 rather then 5w30.
Wrong. W stands for winter - the first number is the oil's viscosity in cold temperatures. Second number is viscosity after it gets hot. (200+ degrees.) Therefore if you want a 'thicker' oil for a track car, you most likely want to raise the second number.
Wrong. W stands for winter - the first number is the oil's viscosity in cold temperatures. Second number is viscosity after it gets hot. (200+ degrees.) Therefore if you want a 'thicker' oil for a track car, you most likely want to raise the second number.
Yeah yeah, brett already corrected me. I thought for sure the w standed for weight. Made sense to me.