SKU: 13366971989

BOSS Lubricants Bulk Diesel Engine Oil CK-4 Full Synthetic & Extreme – 0W-40 · 5W-40 · 15W-40 Synthetic · 10W-30 · 15W-40 Extreme Low Ash EGR DPF SCR On/Off Highway – 205L Drum (Presold Only)

Sale price$408.58 Regular price$453.98
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  • USA
  • CAN

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Description

BOSS Lubricants Bulk Diesel Engine Oil CK-4 Full Synthetic & Extreme – 0W-40 · 5W-40 · 15W-40 Synthetic · 10W-30 · 15W-40 Extreme Low Ash EGR DPF SCR On/Off Highway – 205L Drum (Presold Only)DRUM TOTE CHARGE $50. 00 per Drum $250. 00 per Tote, refundable when returned in original condition Premium Canadian made BOSS API CK 4 heavy duty diesel engine oils choose premium Full Synthetic (true Group III 0W 40, 5W 40, 15W 40) utilizing advanced base stocks for ultimate cold weather flow, fuel economy, thermal stability, and extended drains in extreme Canadian winters, or Extreme (10W 30 fuel economy & proven 15W 40) with Group II+ base oils


DRUM/TOTE CHARGE - $50.00 per Drum/$250.00 per Tote, refundable when returned in original condition

Premium Canadian-made BOSS API CK-4 heavy-duty diesel engine oils – choose premium Full Synthetic (true Group III – 0W-40, 5W-40, 15W-40) utilizing advanced base stocks for ultimate cold-weather flow, fuel economy, thermal stability, and extended drains in extreme Canadian winters, or Extreme (10W-30 fuel-economy & proven 15W-40) with Group II+ base oils for outstanding soot control, wear protection, oxidation/aeration resistance in high-load, high-soot, mixed fleets. Both lines are low-ash formulations engineered to exceed the latest CK-4 requirements (including new oxidation & aeration tests) for 2010+ EGR/EGP / 2017+ GHG engines with DPF/SCR systems while being fully backward compatible with CJ-4/CI-4+ and older specs – perfect for trucking, construction, agriculture, mining, logging, and severe-service diesel engines.

All grades deliver exceptional piston cleanliness, valve train protection, shear stability, TBN retention, and extended drain capability even under severe operating conditions with high soot loading and fuel sulfur levels, while minimizing combustion chamber ash deposits and protecting engine components with high alkaline reserves.

✅ Key Benefits:

  • Exceeds API CK-4 & backward compatible to CJ-4, CI-4+, CI-4, CH-4
  • Outstanding soot thickening control & aeration resistance – passes latest CK-4 tests
  • Superior wear protection for cams, bearings, cylinder liners & valve train
  • Exceptional piston deposit control & engine cleanliness
  • High TBN retention for extended drain intervals & acid neutralization
  • Excellent oxidation, thermal & shear stability – stays in grade longer
  • Low-ash formulation protects DPF, SCR & catalytic converters
  • Outstanding cold-start performance & pumpability (especially low-vis synthetics)
  • Minimizes combustion chamber ash deposits
  • Proudly formulated and bottled in Canada

✅ Grade-Specific Advantages:

  • 0W-40 Full Synthetic → Ultimate arctic cold-start flow (-54°C pour), maximum fuel economy, extended drains in extreme cold fleets
  • 5W-40 Full Synthetic → Superior all-season performance, high VI, maximum protection in severe duty & high temperatures
  • 15W-40 Full Synthetic → Robust high-temperature protection with wide viscosity range, ideal for hot climates and heavy loads
  • 10W-30 Extreme → Fuel-economy optimized for modern GHG engines, lower viscosity, excellent soot handling in mixed fleets
  • 15W-40 Extreme → The #1 heavy-duty workhorse – proven high-soot protection, perfect for mixed fleets & hot climates

Typical Physical Specifications (values are representative of current production):

0W-40 Full Synthetic • Density @ 15.5°C, kg/L: 0.866 • Kinematic Viscosity @ 40°C: 87.27 cSt • Kinematic Viscosity @ 100°C: 15.14 cSt • Viscosity Index: 180 • CCS @ –35°C: 5360 cP • Pour Point: –54°C • Flash Point: 188°C • TBN: 10 • Ash Sulphate, Mass%: 0.99 • HT/HS @ 150°C: 3.55 cP

5W-40 Full Synthetic • Density @ 15.5°C, kg/L: 0.877 • Kinematic Viscosity @ 40°C: 87.75 cSt • Kinematic Viscosity @ 100°C: 14.76 cSt • Viscosity Index: 177 • CCS @ –35°C: 5600 cP • Pour Point: –45°C • Flash Point: 225°C • TBN: 10 • Ash Sulphate, Mass%: 0.99 • HT/HS @ 150°C: 3.85 cP

15W-40 Full Synthetic • Density @ 15.5°C, kg/L: 0.881 • Kinematic Viscosity @ 40°C: 115 cSt • Kinematic Viscosity @ 100°C: 15.05 cSt • Viscosity Index: 146 • CCS @ –20°C: 5800 cP • Pour Point: –43°C • Flash Point: 232°C • TBN: 10 • Ash Sulphate, Mass%: 0.99 • HT/HS @ 150°C: 4.27 cP

10W-30 Extreme • Specific Gravity @ 15.6°C: 0.0865 • Kinematic Viscosity @ 40°C: 81.7 cSt • Kinematic Viscosity @ 100°C: 12.2 cSt • Viscosity Index: 145 • Pour Point: –39°C • Flash Point: 237°C • CCS @ –25°C: 6200 cP • Ash Sulphate, wt%: 1.00 • TBN: 9.1

15W-40 Extreme • Specific Gravity @ 15.6°C: 0.0869 • Kinematic Viscosity @ 40°C: 113.9 cSt • Kinematic Viscosity @ 100°C: 15.6 cSt • Viscosity Index: 145 • Pour Point: –33°C • Flash Point: 226°C • CCS @ –20°C: 5500 cP • Ash Sulphate, wt%: 1.00 • TBN: 9.5

Meets or Exceeds: • API CK-4, CJ-4, CI-4+, CI-4, CH-4 (all grades) • API SN (5W-40, 15W-40 Synthetic) • Cummins CES 20086, 20081, 20087, 20071, 20072, 20076, 20077, 20078 (all grades) • Detroit Diesel DFS 93K222, 93K218, 93K233, 75E 270, 93K215/14 (all grades) • Volvo VDS-4.5, VDS-4, VDS-3, VDS-2 (all grades) • Mack EOS-4.5, EO-O Premium Plus, EO-N PP 03', EO-M (all grades) • Caterpillar ECF-3, ECF-2, ECF-1 (all grades) • Mercedes MB 228.31, 228.3 (all grades) • MAN M3575, 3275 (all grades) • ACEA E7 (all grades) • Ford WSS-M2C171-F1 (all grades) • Renault RLD-4, RLD-3 (all grades) • MTU Category 2.1 (all grades) • JASO DH-2 (all grades) • Global DHD-1 (Synthetic grades) • MIL-L-2104 E/F (Synthetic grades) • Extension sequences in IIIE, VE and L-38 bench test (Synthetic grades) • Daimler MB 228.31 (Extreme grades) • Suitable for virtually all North American, European & Asian on/off-highway diesel engines requiring CK-4 or earlier specifications

Package Size: • 205L steel drum (bulk – presold only) • Drum deposit: $50.00 refundable when returned in original condition (tote deposit $250.00 if applicable)
• Made in Canada
EHC is included in the price

Safety Data Sheet

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 13366971989

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Kindle Customer
Port Orchard, US
★★★★★ 5
Recommend
Flavor Name: Bacon - Kit
My dog likes the taste. Took her a few times to get used to me brushing her teeth; but we have adjusted.
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Reviewed in the United States on March 24, 2026
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Christina Koch
Boise, US
★★★★★ 5
Easy to use, dog loves the taste
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My dog loves the taste and this is super easy to use and let me tell you her self care is NOT EASY so that says a lot about the product
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Reviewed in the United States on March 13, 2026
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Sheri Snider
Cuba, US
★★★★★ 5
This stuff works and pup loves it!
Flavor Name: Bacon - Kit
Breath and teeth began improving on first day of use. Our pup loves the taste of the toothpaste and after the first day, he was ready to have his teeth brushed the second day as soon as he saw me get the tube out! Highly recommend!
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Reviewed in the United States on February 28, 2026
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AZhomeshopper
Lake Worth, US
★★★★★ 5
My dog loves this toothpaste!
Flavor Name: Bacon - Kit
My dog loves the bacon flavor! I was worried that my dog wouldn’t like the toothpaste, but he loves it! It’s hysterical to brush his teeth, and he likes to lick it off the toothbrush, of course!
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Reviewed in the United States on January 27, 2026
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Melissa Alesia
Belleville, US
★★★★★ 5
My dog liked it
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Easy to use and my dog liked it.
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Reviewed in the United States on March 23, 2026

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