Castrol GTX High Mileage 5W-30 Synthetic Blend Motor Oil

Castrol GTX High Mileage 5W-30 is a synthetic-blend motor oil certified to API SP and ILSAC GF-6A (inferred from the 5W-30 grade), with Ford WSS-M2C946-B1 and Ford WSS-M2C961-A1 OEM approvals confirmed on the bottle label. It is targeted at gasoline engines with more than 75,000 miles, where the additive package emphasizes seal conditioning and reduced oil consumption alongside deposit control. The back-label product comparison chart lists a 10,000-mile drain interval; community guidance for synthetic-blend high-mileage oils on typical daily drivers generally runs 5,000·7,500 miles, though the higher number may hold for low-stress highway use. The synthetic-blend base stock places it above conventional GTX but below the full-synthetic Castrol EDGE lineup. The SDS on file was last revised in July 2019 · approximately 7 years old at scoring time; the H-codes and classifications here reflect that revision.

Best for owners maintaining vehicles with 75,000+ miles that require API SP + ILSAC GF-6A and specifically run Ford-approved 5W-30. Skip it if your engine specifies GM dexos1 Gen 3 or Chrysler MS-6395 · those approvals are not confirmed on the bottle label for this product. Owners looking for a full synthetic or a product with disclosed ZDDP concentrations should consider Castrol EDGE 5W-30 or a competing full-synthetic high-mileage offering instead.

The SDS classifies Castrol GTX High Mileage 5W-30 as not hazardous under GHS · no signal word and no H-codes at mixture level. The California Prop 65 warning ("WARNING: Cancer and Reproductive Harm") is confirmed on both the bottle label and SDS §15, associated with trace aromatic compounds (Benzene, Ethylbenzene, Naphthalene, Toluene) in the petroleum base. SDS §8 specifies nitrile gloves for prolonged or repeated skin contact, most relevant at the hot-drain step. Used engine oil accumulates combustion byproducts during service; IARC notes that used mineral-based crankcase oils carry elevated carcinogen risk from these byproducts · avoid prolonged skin contact with used oil and wash thoroughly. SDS §12 states the product is "expected to be biodegradable" and is not expected to bioaccumulate. Used oil goes to collection · not down the drain or on the ground · at most automotive retailers and municipal hazardous waste facilities.