Oil Change, Royal Purple

Originally Posted by CJ_Boxster

Hey thanks for repling to my thread, What weight would you recommend for gear oil on my 100,000 mile original transmission??? I think i want to go with Royal Purple brand also.

Use this link & chart:

http://www.royalpurple.com/techa/tranxref.html


I think you would use the Max Gear 75W90.

[CJ_Boxster]

You are correct, i called the Royal Purple Co. and they told me 75w90 is the correct weight for my boxster.

"There are two sections to these tappets. The center section and the out edges. As computer deems necessary based on load, TPS, RPM etc the cams will switch from 3mm lift to 10 mm lift. If you look at the picture above you will notice the 3 sections to each lobe. This is the equivalent of 2 cams in one. The sections of the tappet will drop out exposing the desired section to achieve a specific lift. At the same time the cams are also advancing from the sprocket on the nose of the intake cams. It is a very elaborate system that relies on oil to act as a hydraulic coupler. This is what activates and moves these items. Never use anything other than the weight the factory recommends." (http://www.imagineauto.com/996TTbuild.htm)

I believe this is variocamplus, but I personaly dont know. I just play it safe and keep it at factory weight. The Porsche engineers know more than I do.

[CJ_Boxster]

Does this apply to variocam plus only or both types?