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Doctor Olds
I Need A Remedy For What's Ailing Me.
Premium,VIP
join:2001-04-19
1970 442 W30
kudos:18
reply to Kearnstd

Re: Why can Porsches go 20K between oil changes?

said by Kearnstd:

I am guessing the filter must have to be changed sooner though.

Depends on the filtration level of the filter and it's surface area (aka size). For less than a quart capacity filter, I'd change it at halfway point and add oil to top off system back to full. For over a quart capacity, then it can go as long as the oil. Especially if using Amsoil EaO filters.

»www.amsoil.com/storefront/eao.as ··· ?1046189
quote:
Ea Filters designated with product code EaO are recommended for 25,000 miles/one year, whichever comes first, in normal service or 15,000 miles/one year, whichever comes first, in severe service.
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