DAYTON_RTA_-_ENGINE_OIL_TECHNICAL_SPECIFICATION_-_2026_-_2-3-26.pdf
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- Attached to
- Engine Oil
- Solicitation number
- GD 26-03
- Issued by
- Montgomery County, Ohio
About this file
This is an engine oil technical specification document developed by the Greater Dayton Regional Transit Authority (RTA) in Montgomery County, Ohio, for the procurement of diesel engine oil to support fleet maintenance operations. The RTA seeks SAE 15W-40 engine oil meeting Cummins Engineering Standard 20086 (CES 20086) and American Petroleum Institute Standard CK-4, with oils sourced exclusively from the current Cummins Engine Oil Registration List. The estimated annual consumption is 7,500 gallons per year, with bulk deliveries required to 600 Longworth Street, Dayton, Ohio, between 7:30 a.m. and 3:00 p.m., Monday through Friday, to an existing 2,000-gallon underground storage tank. The contract covers a two-year period with firm fixed pricing for each year. Sealed bids are due electronically via OpenGov by 10:00 a.m. Eastern time on March 24, 2026, with public bid opening at 4 South Main Street, Dayton, Ohio 45402, 8th floor conference room. The deadline for submitting questions and clarifications is March 10, 2026, at 5:00 p.m. Eastern time, with an estimated award date of May 5, 2026.
Engine oil must meet rigorous quality standards including compliance with Cummins CES 20086, origination from Base Oil Categories Group II, III, or IV, and adherence to specific viscosity, fuel dilution, soot contamination, and total base number limits as defined in the specification tables. The specification explicitly prohibits oils containing supplemental friction modifiers, break-in oils, and re-refined, reclaimed, used, or recycled oils. All deliveries will be tested at the initial delivery and randomly thereafter to ensure compliance, with samples potentially requested prior to contract award. Contractors must comply with all Federal, State, and Local environmental regulations, maintain comprehensive insurance coverage (including Workers' Compensation at $500,000 per occurrence, Commercial General Liability at $1,000,000 per occurrence/$2,000,000 aggregate, Commercial Auto Liability at $1,000,000 combined single limit, and Excess/Umbrella coverage at $2,000,000), and assume full responsibility for all costs associated with spillage, cleanup, and regulatory compliance. The procurement is funded in part by the Federal Transit Administration (FTA) and the Ohio Department of Transportation (ODOT), with no disadvantaged business enterprise set-asides identified.
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Text version
Developed by Daron Brown, Chief Maintenance Officer, Greater Dayton RTA with significant details from Cummins Quick Serve Engine Manuals 2-2-26
Greater Dayton RTA – Engine Oil Specification Revised – February 2, 2026
This specification represents the minimum standards for motor oil to be used primarily in Dayton RTA vehicles equipped with 4 cycle diesel engines with EGR and Aftertreatment.
Documented certification of the requirements listed below must be submitted to RTA to ensure that the oil meets the standards and/or licensing as stated.
The engine oil:
• MUST be on the most current Cummins Engine Oil Registration List for CES 20086
• MUST meet Cummins Engineering Standard 20086 (CES 20086)
• MUST meet American Petroleum Institute Standard (API CK-4)
• MUST be SAE grade 15W-40
• MUST be blended from Base Oil Categories Group II, III or IV.
o Oil blended from Base Oil Category I is NOT acceptable.
• MUST not contain supplemental friction modifiers
• MUST not be classified as a break-in oil
• MUST not be re-refined oil, reclaimed oil, used oil or recycled oil.
• MUST meet used oil analysis guidelines below when compared to new (unused) oil
The Oil Analysis table below was copied from Cummins Quickserve – Fluids for Cummins Products
Service Manual
Table 1: Lubricating Oil Analysis Limits
Oil Analysis Parameter Limit
Viscosity change at 100°C [212°F] (American Society of Testing and Materials (ASTM) D445)
For xW-40 - MIN: 12.5, MAX: 16.3 For xW-30 - MIN: 9.3, MAX: 12.5
Fuel Dilution 5 percent MAX
Table 2: Oil Contamination Guidelines for Soot
Cummins® Engineering Standard (CES) Midrange B and
C Soot Limit All Other Engines Soot
Limt
CES 20076, 20077, 20078, 20081, 20086, 20087, and 20088
3.0 percent MAX 5.0 percent MAX
CES 20075 1.5 percent MAX 1.5 percent MAX
Table 3: Oil Contamination Limits for Total Base Number (TBN)
Engines ≤ 19L Displacement Engines ≥ 19L Displacement
Total base number (ASTM) D4739 2.5 MIN 2.5 MIN or equal to TAN
Developed by Daron Brown, Chief Maintenance Officer, Greater Dayton RTA with significant details from Cummins Quick Serve Engine Manuals 2-2-26
Note: Table 4 should only be used as a reference if flag limits cannot be established through statistical analysis.
Table 4: Lubricating Oil Analysis Guidelines
Oil Analysis Parameter Limit
Water content (ASTM D6304) 3000 parts per million (ppm) or 0.3 percent MAX
Silicon (SI) 15 ppm increase over new oil
Sodium (Na) 20 ppm increase over new oil
Boron (B) 25 ppm increase over new oil
Potassium (K) 20 ppm increase over new oil
Copper (CU) 30 ppm increase over new oil
Iron (FE) 80 ppm increase over new oil
Aluminum (AL 20 ppm increase over new oil
It should be noted that all engine oils will be regularly tested by Dayton RTA to ensure that oil quality standards are being maintained. In addition, oil deliveries will be tested at the 1st, initial delivery and randomly thereafter to ensure compliance to all of the specifications of this contract. The 1st test will be used to establish a baseline of product quality. Samples may be requested for testing prior to a contract award.
The Cummins Engine Oil Registration List is included with this bid package. Any engine oil proposed
MUST meet the following requirements:
1. Be listed on Cummins Engine Oil Registration List
2. Meets or exceeds Cummins CES 20086
3. Meets or exceeds Dayton RTA’s requirements
ALL of the requirements of Cummins CES 20086, as noted in this document and any accompanying documents, must be adhered to in order to meet Dayton RTA’s Engine Oil standards.
SPECIAL SPECIFICATIONS
This contract is for a 2-year period with firm fixed prices for each year of the contract. It is estimated that the RTA will use approximately 7,500 gallons of engine oil per year. These quantities are not guaranteed and shall not be binding upon RTA. Engine oil shall be delivered in bulk to 600
Longworth St. The RTA has a 2000-gallon underground storage tank for new engine oil. Deliveries are to be made between the hours of 7:30 am and 3:00 pm, Monday through Friday.
The contractor shall comply with all Federal, State and Local environmental regulations. This includes, but is not limited to, fluid delivery, fluid transfer, spill prevention/containment procedures, necessary equipment to ensure compliance and supplying MSDS sheets prior to delivery. The Contractor shall be responsible for all costs associated with any spillage, including regulatory fines, cleanup materials and labor, damages to property from the spillage or any other costs related to the spillage and/or failure to comply with all environmental regulations.
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