Certain kinds of motor oils behave differently. Ideally, an engineer would prefer the oil viscosity to remain the same when the engine is hot as when it is cold. Motor oil includes additives developed ...

Viscosity the most important physical property of a lubricating oil, as determines how easily the oil circulates and its load carrying capability. Maintaining the correct balance between low viscosity ...

When it comes to engine oil, fleet owners face a dilemma. They want the greater fuel efficiency that lower-viscosity oil can offer, but they’re concerned that it won’t provide the durability and wear ...

Specialists weigh in on cold starts, wear protection and other oil viscosity matters. Nine out of 10 heavy-duty long-haul trucks use 15W40 oil. Despite that long-standing domination, that viscosity ...

Oil is the lifeblood of your engine, regardless of whether you're behind the wheel of a Mitsubishi Mirage, Ferrari Roma, or Cummins-powered Ram truck. While every aspect of vehicle maintenance is ...