Drive only weekends, new oil change schedule?

Messages
761
Location
USA
I started a new job 2 months ago (commute into NYC via bus) and rarely drive my 05 Forester during the week. I estimate that I will go from annual mileage of 16-18k a year to 8-10k a year. I have been using Havoline 5-30 and subaru OEM filters at 4k intervals. on average, I now use the cae 2-3 times a week and not everyday. Given the above, should I reconsider anything or just stick with the same schedule.
 
Messages
6,436
Location
New Braunfels
How far do you drive when you do use it? I would go to the maximum time limit in your manual until the warranty is up if you drive more than 10 mile trips on your weekend forays.
 
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