DAYTON_RTA_-_ENGINE_OIL_TECHNICAL_SPECIFICATION_-_2026_-_2-3-26.pdf

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.