5W/40 Monolec Ultra® Syn Heavy Duty Engine Oil (8854)

Regular price $199.10 Save $-199.10
-25 in stock

MONOLEC ULTRA® SYN HEAVY DUTY ENGINE OIL (8854)

SAE 5W-40 synthetic oil for diesel engines

Broad-Range Synthetic Diesel Engine Oil Pays for Itself with All-Weather Performance, Wear Protection and Fuel Economy

Monolec Ultra® Syn Heavy Duty Engine Oil is a multiviscosity SAE 5W-40 synthetic oil for diesel engines that delivers outstanding year-round performance, fuel efficiency and extended drains. It has been formulated to exceed API’s CK-4 technology standards focusing on engine wear protection, oxidation stability, shear stability, resistance to aeration, and compatibility with low-emission engines. With its synthetic base oil and exclusive additive package, it provides reliable lubrication – even in low temperatures – without the shear stability and viscosity problems of conventional diesel engine oils. Its high viscosity index indicates less change in viscosity over a broad temperature range.

A primary advantage of 5W-40 vs. 15W-40 engine oil is better fuel economy. In a controlled lab setting, GM 6.5L dyno testing showed a 1.5-1.6% fuel economy improvement. In addition, lowviscosity oils achieve flow quickly during cold startups. Most engine wear occurs within the first two to five minutes of starting. However, conventional low-viscosity oils have not always provided adequate oil film at operating temperatures, which resulted in increased wear and made it difficult to obtain OEM approvals. Monolec Ultra Syn eliminates this problem with its ability to flow quickly in cold weather and maintain viscosity at operating temperatures. It also meets all major OEM approvals.

Monolec Ultra® Syn Heavy Duty Engine Oil lubricates parts faster, prevents wear during operation, and decreases fuel consumption – making it the smart choice for fleet managers and owner operators who want better fuel economy and reliable low temperature performance.

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USA Shipping: 
Free shipping for Extreme oil filter kits or Extreme kits with accessories added to the same order. Free shipping no longer applicable for filter accessories or elements. We ship using USPS priority shipping (unless notified or requested otherwise), tracking # will be automatically sent. 

International Shipping: 
International shipping cost is calculated during checkout, if you don't see your country as a shipping option please contact us. 

Returns Policy
GENERAL RETURN POLICY: 
Due to some abusing our past return policy we have laid out new rules: Please refer to the installation guide or general installation video before purchasing your kit, it's also best to confirm the pressure port and return port locations before purchasing a kit. We do not allow returns due to remorse or kits not matching your  engine model. Insane Diesel will always work with you to find alternative solutions to installation any kit on different model engines, our goal is to get the kit installed no matter what, please refer to our guarantee. 

DAMAGED PRODUCT RETURNS: All products are inspected before shipment and any damaged products must be photographed and reported within 4 business days from the delivery date. Only damaged products can be immediately replaced or returned for a refund. Damaged product returns must be wholly unused and they must arrive in original condition. A USPS  pre-paid shipping label will be sent to return damaged products. We want to make sure you’re happy with our product so please contact us if you have any questions about your return at support@InsaneDiesel.com
5W/40 Monolec Ultra® Syn Heavy Duty Engine Oil (8854)
5W/40 Monolec Ultra® Syn Heavy Duty Engine Oil (8854)
5W/40 Monolec Ultra® Syn Heavy Duty Engine Oil (8854)
5W/40 Monolec Ultra® Syn Heavy Duty Engine Oil (8854)