To help the oil keep your engine cool, calm, collected — and clean and corrosion-free — refiners blend in various additives, which can account for as much as 25 percent of the cost of the oil.

The correct viscosity depends on the expected temperature range in which you'll be using your truck. Ford has supplied an SAE viscosity grade chart for the 6.7 Power Stroke engine in the photo below: ...

Today, major diesel engine builders such as Caterpillar, Cummins, Paccar, and Navistar include lower viscosity grades in their oil viscosity recommendations CITATION SEB19 \l 1033 (SEBU6250 ...

The new low-HTHS-viscosity oils will be more on the lower end of the viscosity range found in SAE 30 oils. Shell field-tested an experimental low-HTHS-viscosity oil against a traditional 15w-40.

An extensive effort is under way to revise the SAE Engine Oil Viscosity Classification System to reflect user needs more realistically. To understand how the present system evolved, the history of the ...

Modern engine design and the need to reduce CO 2 emissions have led to the development of additional engine oil categories and a growing number of engine oil viscosity grades for diesel engines ...

For example, motor oils labeled 10W-40 had viscosity measures that were widely and unacceptably at variance with the universally defined characteristics of 10W-40 motor oil.

Officials said the use of a motor oil with viscosity levels that are either too high or too low for a vehicle's engine specifications may result in the risk of engine failure. "Many of these ...

The new oil protects against wear, oxidation and nitration, which can result from the high operating temperatures found in natural gas engines. Tests have also shown that CNG/LNG 15W-40 can help ...