Castrol® GTX® Full Synthetic provides maximum protection to help fight the impact of severe conditions that can potentially shorten engine life. Castrol® GTX® Full Synthetic dramatically reduces engine wear. Plus, it cleans away old sludge* and protects against new sludge formation better than required by the latest industry standard. It’s GM dexos-1 approved (OW-20 and 5W-30) and offers protection for 10,000 miles.
*When tested in engines with high levels of sludge.
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