Sierra 10W-30 Semi-Synthetic Catalyst Oil, 55 Gallon Drum, 18-9421CAT-7

Sierra 18-9421CAT-7 is a semi-synthetic 10W-30 catalyst oil supplied in a bulk 55 gallon drum, formulated for use as a marine engine lubricant in high-volume service and fleet applications. The semi-synthetic base blend combines conventional and synthetic base stocks to deliver stable viscosity performance across a range of operating temperatures while helping protect internal engine components during extended run cycles. The 55 gallon drum format is intended for shops, marinas, and service operations that go through oil in volume and want to avoid the cost and waste of smaller individual containers. As a 10W-30 multi-viscosity oil, it is designed to flow readily at startup while maintaining a protective film at normal operating temperatures.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-9421CAT-7
• Product Name: Catalyst Semi-Synthetic Oil
• Viscosity Grade: 10W-30
• Oil Type: Semi-Synthetic
• Container Size: 55 Gallons
• UPC: 808282388522

Frequently Asked Questions

What viscosity is Sierra 18-9421CAT-7 oil? Sierra 18-9421CAT-7 is a 10W-30 multi-viscosity oil, formulated to flow well at startup and hold its protective film at normal operating temperature.

Is this a synthetic or conventional oil? It is a semi-synthetic blend, combining conventional and synthetic base stocks in the Sierra 18-9421CAT-7 Catalyst oil.

What size container does 18-9421CAT-7 come in? Sierra 18-9421CAT-7 is packaged in a 55 gallon drum, intended for bulk or high-volume use rather than individual quart or gallon purchases.

Who is the 55 gallon drum size intended for? The 55 gallon drum format of Sierra 18-9421CAT-7 is intended for shops, marinas, and service operations that use enough oil to benefit from bulk purchasing.

What is the UPC for Sierra 18-9421CAT-7? The UPC for the Sierra 18-9421CAT-7 Catalyst Semi-Synthetic 10W-30 oil is 808282388522.

Does semi-synthetic oil perform differently than full synthetic? Semi-synthetic oil, like Sierra 18-9421CAT-7, blends conventional and synthetic base stocks, which typically offers improved performance over conventional oil at a different cost point than full synthetic formulations.

Can 18-9421CAT-7 be purchased in smaller container sizes? The Sierra 18-9421CAT-7 part number as listed here refers specifically to the 55 gallon drum size.

What does the 10W-30 rating mean for cold starts? The 10W in the 10W-30 rating on Sierra 18-9421CAT-7 indicates the oil's flow characteristics at lower temperatures, helping it circulate more readily during startup compared to a higher first-number oil.

Is Sierra 18-9421CAT-7 sold by the individual quart? No, this listing is for the 55 gallon bulk drum of Sierra 18-9421CAT-7 Catalyst Semi-Synthetic 10W-30 oil, not individual quarts.

What is the brand of the Catalyst Semi-Synthetic 10W-30 oil? The Catalyst Semi-Synthetic 10W-30 oil in the 55 gallon drum is manufactured by Sierra under part number 18-9421CAT-7.