HTElectrical wrote:
The Intelligent Oil-Life Monitor adjusts change intervals for the type of driving conditions. No need to change it until it is less than 5%. Just a waste of money, especially if you have 10 quarts to change like I do.
From page 420 of the 2013 F-150 Owner's Manual
From that same document. This is useful to know:
7500-10000 Normal
– Normal commuting with highway driving
– No, or moderate, load or towing
– Flat to moderately hilly roads
– No extended idling
5000-7499 Severe
– Moderate to heavy load or towing
– Mountainous or off-road conditions
– Extended idling
– Extended hot or cold operation
3000-4999 Extreme
– Maximum load or towing
– Extreme hot or cold operation
The big question is how much faith do you want to put in the software to do the right thing with these categories?
I still stay the oil analysis is the best way to make sure you're changing the oil at the right interval.