Oil change question

Recently, I have not been driving that much each week. Maybe 1 to 5 miles a
week if that. When I do drive my car every dayu, I religiously change my oil
every 3 months. But now that schedule does not make sense to me if the car
is only being driven 1 to 5 miles a week. I use Mobil 1 synthetic and K&N
oil filters so oil changes are not cheap either. Can I and how should I
adjust my oil changing schedule for my car's usage? Is every 4 months safe
while I am driving so infrequently?

 

You probably know that ONE of the reasons oil has to be
changed is due to its accumulation of acids. Engines in
cars that are driven only for a few miles at a time do not
get hot enough to rid themselves of moisture in the oil,
and, over time, develop an acidity. Hence the standard
advice to change your oil every 3,000 miles or three months,
whichever comes first. Mobil 1 resists the formation of
acids and sludge to a greater extent than conventional oil,
but that doesn't mean you can totally ignore this
consideration. I'm no engineer, but I would think changing
your Mobil 1 oil every four months would be fine.

Al Phillips