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New Oil Spec For Natural Gas Engines – CES 20092

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There’s a new engine oil specification for Cummins Westport midrange and heavy-duty natural gas engines using stoichiometric (vs lean) combustion.

Cummins Engineering Standard CES 20092 delivers significantly improved oxidation and thermal stability compared to oils formulated for prior certification levels.

Modern stoichiometric natural gas engines such as the ISX12G/ISX12N and ISLG/L9N run at higher engine temperatures – and if your bus fleet is currently using oils with a CES 20074 or CES 20085 certification, you should transition as soon as practical to an oil with the CES 20092 spec. While these legacy oils are compatible, optimal performance and improved maintenance will only be achieved by switching to CES 20092 oils.

The CES 20085 standard will become obsolete as of January 2020, and only oils conforming to CES 20092 standards will be produced from that point on.

Note: Older lean-burn natural gas engines should continue to use CES 20074 engine oil, which will continue to be available, until further notice (see chart below).

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Cummins endorses and recommends Valvoline™ Premium Blue One Solution™, which allows bus operators to effectively double the length of oil drain intervals up to 1,000 hours/12 months for the L9 platform. Alternative oil suppliers with products meeting the new standard can be seen on this Oil Registration List which is available to QuickServe Online (QSOL) users. You can sign up for a QuickServe Online account at quickserve.cummins.com.

Cummins endorses and recommends Valvoline™ Premium Blue One Solution™, which allows bus operators to effectively double the length of oil drain intervals up to 1,000 hours/12 months for the L9 platform. Alternative oil suppliers with products meeting the new standard can be seen on this Oil Registration List which is available to QuickServe Online (QSOL) users. You can sign up for a QuickServe Online account at quickserve.cummins.com.

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