SKU: 79356900135

BOSS Lubricants CK-4 Heavy Duty Diesel Engine Oil Full Synthetic 0W-40 · 5W-40 & Extreme 10W-30 · 15W-40 Low Ash EGR DPF SCR On/Off Highway

$152.95 $169.95
Save 10%
No.2 Bestseller on so24.fr >

Pay in installments of $42.49 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 24 - Jul 29

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

BOSS Lubricants CK-4 Heavy Duty Diesel Engine Oil Full Synthetic 0W-40 · 5W-40 & Extreme 10W-30 · 15W-40 Low Ash EGR DPF SCR On/Off HighwayPremium Canadian made BOSS API CK 4 heavy duty diesel engine oils choose premium Full Synthetic (true Group III 0W 40 & 5W 40) for ultimate cold weather flow, fuel economy, and extended drains in extreme Canadian winters, or Extreme (10W 30 fuel economy & proven 15W 40) 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

Premium Canadian-made BOSS API CK-4 heavy-duty diesel engine oils – choose premium Full Synthetic (true Group III – 0W-40 & 5W-40) for ultimate cold-weather flow, fuel economy, and extended drains in extreme Canadian winters, or Extreme (10W-30 fuel-economy & proven 15W-40) 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 / 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.

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.

✅ 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 grades)
  • 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
  • 10W-30 Extreme → Fuel-economy optimized for modern GHG engines, lower viscosity, excellent soot handling
  • 15W-40 Extreme → The #1 heavy-duty workhorse – proven high-soot protection, perfect for mixed fleets & hot climates

Typical Physical Specifications (representative values):

0W-40 Full Synthetic • Kinematic Viscosity @ 40°C: 87.3 cSt • Kinematic Viscosity @ 100°C: 15.1 cSt • Viscosity Index: 180 • CCS @ –35°C: 5360 cP • Pour Point: –54°C • Flash Point: 188°C

5W-40 Full Synthetic • Kinematic Viscosity @ 40°C: 87.8 cSt • Kinematic Viscosity @ 100°C: 14.8 cSt • Viscosity Index: 177 • CCS @ –30°C: 5600 cP • Pour Point: –45°C • Flash Point: 225°C

10W-30 Extreme • 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

15W-40 Extreme • 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

Meets or Exceeds: • API CK-4, CJ-4, CI-4+, CI-4, CH-4 / SN (5W-40) • Cummins CES 20086, 20081, 20087 • Detroit Diesel DFS 93K222, 93K218, 93K233 • Volvo VDS-4.5, VDS-4, VDS-3 • Mack EOS-4.5, EO-O Premium Plus & earlier • Caterpillar ECF-3, ECF-2 • Mercedes MB 228.31 • MAN M3575 • Ford WSS-M2C171-F1 • Renault RLD-4 • MTU Category 2.1 • ACEA E7 • JASO DH-2 • Suitable for virtually all North American, European & Asian on/off-highway diesel engines requiring CK-4 or earlier specifications

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: 79356900135

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.2 ★★★★★
Based on 24 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
S
Verified Purchase
Susan Curtis
West Palm Beach, US
★★★★★ 5
Wonderful Blanket!
Size: 50"x60", Color: Chocolate Brown, Size: 50"x60", Color: Chocolate Brown
My favorite blanket yet! It’s soooo soft, it does not shed and the weight is very nice. It’s warm and plenty big enough. It’s looks pretty too. Both sides are the same, the perfect thickness.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 23, 2026
J
Verified Purchase
Jason schleich
New York, US
★★★★★ 5
UN‐FREAKIN-BELIEVABLE!!!
Size: 50"x60", Color: Dark Brown
I think of myself as a Connoisseur of Faux Fur Blankets folks so my opinions on this blanket should be taken seriously. I have acquired at least 20 faux fur blankets over the last 15ish years-- it's a problem & I admit it. I've purchased small ones, big ones, cheap-expensive- i have earned my knowledge!! This Blanket is hands down THE NICEST! Holy crap is it soft!! BUTTER!! It is made so Beautifully, it's just very special. I love the bit of stretch it has, it adds to the aesthetic somehow. The color is a rich beautiful Brown, i mean it even LOOKS soft--it's just awesome. It is a perfect weight, not too heavy or too light,, Cozy as a MoFo! Just buy it, get it, live happily ever after with it--you won't regret it. *****UPDATE***** 12/22/25 - I've had this Blanket for almost a year..It's just as soft & beautiful as the day I got it! It has NEVER shed so I don't understand reviews stating it does? When washing these Blankets DO NOT USE WARMTH OF ANY KIND! Washer OR Drier!! The fabric is very delicate so heat will ruin it--even the slightest. Wash on COLD only, and only use AIR drier settings (fluff), NO HEAT FOLKS! It takes about 4 or 5 times to Dry on air only but it is worth the extra time when it comes out perfect. One more thing, NEVER- EVER- EVERRR USE FABRIC SOFTNER. It is wax which will coat all those Beautifully soft fibers and ruin them for good. If you follow these pretty easy suggestions your blankets will stay as awesome as the day you got 'em. I hope this helps. OH.. & GET THE BLANKET!!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 17, 2025
J
Verified Purchase
jsaint
Houston, US
★★★★★ 5
Gorgeous & so soft!
Size: 50"x60", Color: Olive Green
This is hands down the most beautiful throw I’ve ever had. It’s so soft & luxurious on both sides, which is hard to find. It’s warm but not too warm ,just perfect! I got the olive green & it’s a beautiful shade, not too yellow or muddy. I don’t know why people report shedding issues, I wonder if there were some bad batches? Mine hasn’t shed at all. Just washed it for the first time, came out perfect. No lint at all in dryer screen.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 13, 2026
S
Verified Purchase
Sarah Pseudoscience
Boise, US
★★★★★ 5
For a luxurious throw,
Size: 50"x60", Color: Grey
I originally bought this throw just to have something cozy around the house—and I was immediately impressed with how unbelievably soft it is. After owning (and loving) a lot of blankets, I’ve realized most only have that plush, silky feel on one side. This one is different—it’s soft on both sides, with a weight and drape that feels genuinely luxurious. The dark gray color is another standout. It looks elevated and expensive, and it’s held up beautifully through multiple washes without losing that silky texture at all. It honestly feels just as soft as the day we got it, which is rare. But the reason I had to write this review is unexpected. We’ve been sleep training our almost 1.5-year-old son, and this blanket somehow became part of the routine. It lives in his room, draped over the rocking chair for those long middle-of-the-night wakeups. Over time, he started pulling it down and choosing to sleep on top of it… on the floor. We couldn’t tell if he preferred the floor—or the blanket. So I tried something: I put the throw on his bed. And just like that… he started sleeping in his bed. Apparently, this blanket is the key to sleep training. If you’re looking for something soft, durable, and genuinely cozy, this is already a great buy. But if you happen to have a toddler resisting bedtime… this might just be your secret weapon too.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 12, 2026
R
Verified Purchase
Rachel
Port Orchard, US
★★★★★ 5
Very soft. Wash only on gentle cycle in cold water and low tumble dry. Fabulous blanket.
Size: 50"x60", Color: Orange
So far so good. It was a little sheddy at first but then I washed it and it was fine. It is super soft even after being washed twice. Several people have commented on how soft it is and stated they thought it was a Minky couture. I washed it on gentle cycle in cold water and dried it on gentle low tumble dry. It does not seem to be shedding now. I washed it a second time and put vinegar in the rinse cycle because supposedly that is supposed to help bind the fibers or something. Still seems to be not shedding. It's probably the softest blanket I have every owned. When I wash it, I will continue to wash it on gentle in cold water and dry on either gentle low tumble dry r just air fluff. I read the heat good make the fibers loose and cause more shedding. If anything changes, I will update.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 2, 2026

recommand products

Now Foods Digest Ultimate - 120 Veg Capsules
36.99
OLBA RAT TRAP MULTICATCH 40X23X21
32.20
KELLY BRUSH MAXI
15.34
Swanson Full Spectrum Uva Ursi Leaf 450 mg - 100 Capsules
10.49
SPINKY HAMSTER CAGE
58.10