Castrol GTX uses premium, custom-made additives and is the most advanced conventional oil available. This premium motor oil contains unique Tri-Shield technology that actively protects against particles that build up in car engines with the most advanced deposit-fighting ingredients. Provides ultra-low friction to improve gas mileage in 5W-20, 5W-30 and 10W-30 grades. Castrol GTX Motor Oil provides maximum protection against viscosity and thermal breakdown.
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