Duragard® Diamond Plate® SAE 15W-40 CI-4 Plus Synthetic Blend Engine Oil

Product Code: DUR15/40synbl
AVAILABLE IN: 2.5 gal JUG, 5 gal PAIL, 16 gal KEG, 30 gal DRUM, 55gal DRUM, and BULK (in selected areas)

2.5 gal Jug

5 gal Pail

16 gal KEG, 30gal DRUM, 55gal DRUM, and BULK (in selected areas)




Gravity, ºAPI ASTM D287 31.14
Specific Gravity @60ºF (15.6ºC) ASTM D4052 0.87
Flash Point ºC ASTM D92 220
Flash Point ºF ASTM D92 428
Viscosity @ 40ºC cSt ASTM D445 115
Viscosity @ 100ºC cSt ASTM D445 15.9
Viscosity Index ASTM D2270 148
Pour Point ºC (ºF) ASTM D5950 -36ºC (-33ºF)
Cold Cranking Simulator at (ºC), cP ASTM D5293 4786 (@ -20 ºC)
High Temperature/ High Shear Vis at 150ºC, cP ASTM D5481 4.3
Noack Volatility, % loss ASTM D6375 12
Color ASTM D1500 2.5
Zinc, wt. &37; ASTM D5185 0.132
Phosphorus, wt. &37; ASTM D5185 0.121
Calcium, wt. &37; ASTM D5185 0.129
Sulfur, wt. &37; ASTM D4951 0.367
Magnesium, wt. &37; ASTM D5185 0.12
Molybdenum, wt. &37; ASTM D5185 0.0046
Pumping Viscosity at (ºC), cP ASTM D4684 22,100 (-25)
TBN, mgKOH/g ASTM D2896 12

Duragard® Diamond Plate® SAE 15W-40 CI-4 Plus Synthetic Blend Engine Oil is formulated with select Hydro cracked clear base oils and Very High Viscosity Index (VHVI) Synthetic Base Fluids that provide superior low temperature fluidity and high temperature film strength that cannot be achieved using conventional mineral base oils. This oil uses a technically advanced low ash additive technology that balances a combination of metallic detergents, ashless dispersants, multi-purpose inhibitors, and de-foamers that provide superior start up and maximum fuel economy in electronic fuel injected diesels.

Duragard® Diamond Plate® SAE 15W-40 CI-4 Plus Synthetic Blend Engine Oil is specifically engineered for use in mixed fleets, gasoline and diesel. This product has proprietary industry leading detergency and soot dispersancy chemistry with an emission system compatible low sulphated ash level. The high (12) TBN to low ash ratio make this an outstanding lubricant for modern low emission diesels, and also older diesels, that required a low ash industry leading clean oil.

Duragard® Diamond Plate® SAE 15W-40 CI-4 Plus Synthetic Blend Engine Oil is noted for its high viscosity index resulting in higher oil pressure, and its superior high temperature volatility characteristics result in less oil consumption. Stay-in-grade shear stability enables the oil to maintain viscosity in severe high-temperature and heavy load operations. The direct benefit is less engine deposits and extended engine and turbocharger life. This synthetic blended SAE 15W-40 has a cold pour point superior to most competitive SAE 10W-30 conventional mineral based oils.


  • * Exceeds warranty requirements of engine manufacturers that require a type ILSAC GF-3 or API CI-4 PLUS licensed premium synthetic blend SAE 15W-40 motor oil.
  • * Synthetic blended base oils resists fluid breakdown better at high loads and temperatures but also provide easier starting at low temperatures.
  • * A high level of corrosion inhibition provides superior rust protection for rocker arm assemblies, valve lifters, and other vital moving parts.
  • * Low ash detergency combined with super-dispersion action controls engine deposits/soot to maintain cleaner engines over extended oil change intervals.
  • * Advanced technology provides reduced internal friction, drag, and heat to help extend engine life while providing continual fuel and energy savings compared to any conventional oil.
  • * Fortified with selected additives to handle deposits caused by operation of emission control systems, and to provide outstanding shear stability.
  • * High 12 TBN

Duragard® Diamond Plate® SAE 15W-40 CI-4 Plus Synthetic Blend Engine Oil meets and exceeds the most current specifications, similar to CI-4 PLUS, CI-4, CH-4, CG-4, CF-4, CF/CE/CD, SL/SJ/SH/SG as well as the current military specification type MIL-L-2104F/MIL-L-6152 Dept of Defense (CID) A-A-52036A (CID) A-A-52039A

This product meets, or exceeds the requirements similar to the following manufacturers and global specifications:

Allison C-4 John Deere
Caterpillar ECF-1, CAT TO-2, ECF-2 Mack EO-M, EO-M+, EO-N, EO-N PREM+, EO-N PREM+ 03
Cummins CES20078, 20077, 20076, 20072, 20071 MAN 271, 3275
DDC/MTU Series 2000/4000 Category DHD-1, DH-1 Mercedes 228.1 & 228.3
Detroit Diesel 7SE270, 93K210 MIL-L-46152D, MIL-L-46152E
Detroit Diesel Power Guard 93K214 US Military CID A-A-52306, 52039A
EMA LRG-1 MTU MTL 5044 Type 2
Ford WSS-M2C171C, M2C153D, M2C171B Navistar
GM 6085M, 6094M RVI RLD-2
Global DHD-1, DH-1 White/Volvo VDS, VDS-2, VDS-3

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For specific product risks check the manufacturer’s SDS Section 15: Regulatory information.