I should have prefaced this: This is my opinion after weeks of research.
stay away from 10w30, a lot of experts say stay away from mobil. I was also warned against Highmilage as boxsters don't need them. I used castro syntec 10W40 and I did a lot of research and found nothing bad about castrol syntec 10w40. autozone has it with a free filter for 27.99 a gallon. I have a 2001 "s" 61k miles I got the filter for my mountaineer. Use a napa gold filter for boxster.
Last edited by mptoledo; 08-09-2009 at 07:27 PM.
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