Castrol Syntec (5W-40) - 986 Forum - The Community for Porsche Boxster & Cayman Owners

litteng · 05-10-2009, 08:26 PM

as i recall that was the whole issue of the lawsuit Mobil filed against Castrol say about 10 yrs ago, mobils' argument was that a synthetic oil was made from poly olephins (a natural gas derivative) and not specially treated convention oil...

the judge ruled that castrol was within their right and so synthetic has taken on a whole new meaning....

i have been running delvac1 for yrs in my vw's and expect that it would work just fine in the boxster for its second upcoming oil change...

Cloudsurfer · 05-10-2009, 10:06 PM

Delvac 1 is VERY good oil. You could probably run it in the Porsche, though depending upon how much consumption you have, it could potentially be not so good for the cats.

I've run Delvac 1 in many motorcycles with great results.

litteng · 05-11-2009, 06:14 AM

are not seeing any noticeable oil consumption with this 2006, has less than 20,000km on it

Blue-S · 05-11-2009, 10:32 AM

Quote:

Originally Posted by bmwm750

Delvac 1 is VERY good oil. You could probably run it in the Porsche, though depending upon how much consumption you have, it could potentially be not so good for the cats.

I've run Delvac 1 in many motorcycles with great results.

According to Mobil, Delvac 1 meets SM standards. That should indicate that it has very little Zinc or Phosphorus, so it shouldn't have a negative effect on catalyst life.

http://www.mobiloil.com/usa-english/motoroil/car_care/askmobil/mobil_1_vs_mobil_delvac_1_for_a_gasoline_engine.as px

Related question: has anyone tried Quaker State Q horsepower 5w40 synthetic? It is supposed to be the same as one of the Shell Helix oils (Shell owns Quaker State) and is Ferrari approved.