best weight oil for 04 cobra with 470rw horsepower
i heard that 5w20 oil was only to meet gov-specs for fuel economy, and that 5w30 oil is actually better for the 4.6 4v engine.
i heard that 5w20 oil was only to meet gov-specs for fuel economy, and that 5w30 oil is actually better for the 4.6 4v engine.
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