We remain fully operational. Our teams are working around the clock to ensure your deliveries continue safely.
DOWNLOAD THE APP
Customer Services
Copyright © 2025 Desertcart Holdings Limited
DOWNLOAD THE APP
🛢️ Power your diesel with the ultimate shield against wear and tear!
Schaeffer Manufacturing Co.'s SynShield Durability Advantage 15W-40 is a premium synthetic-plus diesel engine oil designed for heavy-duty use. It delivers exceptional wear protection, friction reduction via proprietary additives, and strong oxidation resistance, ensuring engine longevity and optimal performance even in severe conditions. Compatible with modern emission systems, this 12-quart pack meets and exceeds API CK-4 standards, making it a trusted choice for diesel professionals.
| ASIN | B06VVWMCZS |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #75,126 in Automotive ( See Top 100 in Automotive ) #598 in Motor Oils |
| Brand | Schaeffer Manufacturing Co |
| Date First Available | February 14, 2017 |
| Item Weight | 24.1 pounds |
| Item model number | 0700CK4-012 |
| Manufacturer | Schaeffer Manufacturing Co. |
| Package Dimensions | 13.75 x 10.75 x 9.25 inches |
| SAE J300 Viscosity Grade | 15W-40 |
| Size | 1 Quart (Pack of 12) |
| UPC | 744954027552 |
| Vehicle Service Type | Diesel vehicles |
| Viscosity | 15w-40 |
P**T
GREAT OIL EXCELLENT PROICE
This motor oil for my FORD 1997 diesel power stroke is fantastic and I can tell the difference in performance. I recommend this oil to anyone with needing 15-40 wight synthetic.
C**P
This is in my opinion the absolute best oil one can buy for all uses
I bought this oil for my tractor after my mechanic suggested it to me several years ago. It is more expensive yes but it is my opinion the best money can buy. I use it in all of my equipment and vehicles.
M**K
Great product
Best oil on market
W**7
Great oil, but....
Swapped to schaeffers from Rotella 15w40 and noticed increased oil pressure, slightly better fuel economy, and a quite engine. I was quite impressed. It's really good oil, but... the downside is the price, I recommend going through a nearby sales rep as the prices are exponentially cheaper than buying from a 3rd party vendor such as Amazon, Napa, O' Reillys etc.
C**R
Great oil
Some of the best oil on the market
D**R
It is oil.
It showed up quickly. It was clean and unbroken. And I love how it is working in my truck. I thought it was cool when it was bright green. My oil is still kinda green so I know my oil filter is working with the oil.
W**N
Cant seem to get product
We use this oil exclusively with our Diesel Trucks because its good quality but for some reason I cant get Amazon to deliver it anymore. They keep giving me the excuse its undeliverable each time. So I guess I will have to get my product elsewhere.
R**A
More premium then Rotella?
I'm running this in my '17 F250 6.7, all previous oil changes were T6. Schaeffer's is supposed to be far more premium but honestly I think the Ford 6.7 runs better on Rotella. It seems to run louder on Schaeffer's and this oil meets Ford's specs. I bought Schaeffer's because it was on sale here on Amazon for $6 a gallon less then T6, and because I was intrigued to try it. I also noticed that I get a hair better fuel economy with Rotella but its so small maybe its not worth mentioning. I'm going to give Schaeffer's a little more time since I bought enough for 3 oil changes, but I'm feeling in my gut T6 will probably be the winner after I've gone through all the Schaeffer's.
Trustpilot
1 week ago
2 days ago