Oil Change Interval

Posted by Cabreco on Apr 21, 2013; 9:50pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/Oil-Change-Interval-tp4039734.html

How often should I change my oil?

This is currently the status of my Fiona. she has 25,000 original miles.

When I bought it May 2011 I added seafoam to the original oil that was in it. I ran it for 10 minutes then drained it & filled with oil, changed the filter added seafoam again to the crankcase ran it for about 100 miles & drained it & replaced the filter again. After that she was really clean. I changed the oil & filter.

Last May, I did an oil change/filter again with Rotella T 15w 40 oil. Now since the oil change I have put about 2000 miles on her in the last year. She never sits idle I ride her at least a few miles 3 or 4 times a week. I know the manual says annually but then oil technology has change signifiacantly in 30 years.

So this being the case, what frequency should I use to change the oil? or should I use mileage?  

Now if I use Synthetic Rotella would the change interval change?