Not surprisingly, service providers (oil-change shops and dealerships) tend to recommend shorter change intervals (3000 to 5000 miles). That can never hurt your engine, but it also means they'll ...

Semi-trucks may need an oil change every 25,000 miles. That interval may vary depending on such factors as the type of fuel and the kind of load a truck tows.

Generators often go through long spells without being used, but you still need to stay on top of maintenance. How often ...

The oil change interval is specified in each vehicle's instruction manual. Engine designers determine it by considering the engine characteristics and the vehicle's anticipated operating conditions.

Because the vehicle and engine are working harder, the oil change interval will be more frequent and lean more toward the 3,000 to 5,000-mile markers. Owner’s manuals will list “severe driving ...

Over time, manufacturers have learned to chemically engineer oil to be uniform and have fewer impurities, which raised oil change intervals from every 3,000 miles to every 7,500 to 10,000 miles.

Best diesel engine oil: Shell Rotella T6 Full Synthetic Diesel: Synthetic: 1 gallon/5 gallon: ... Once again, going with the manufacturer's recommended oil change intervals is always your safest bet.

Oil drain intervals. Next, ensure the oil drain interval (ODI) schedule matches reality. Going too long between oil changes will make the engine work harder and reduce fuel efficiency, and the ...

Healthy engine oil should be light brown, so if yours is black, you may be wondering if it's time for an oil change. Here's what you need to know.

Just like determining the right oil change interval—which is sometimes a good idea to shorten—determining which engine oil weight to change it with is an important factor in sound automotive ...

Most modern vehicles have change intervals in the 7500-to-10,000-mile range—generally, ... then you may want to change the engine oil as often as every 5000 miles or six months.