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I decided to do the 160k service at 155k miles. I think after 100k miles, most of the items from the list should be done more often (every 20k to 30k), rather than 50-60k. Off course engine oil, and air filters should be changed more often (10k)
Following is what I just did:
Air filters replaced (Mann) Oil and oil filter replaced (Redline 04-40, Mann) Cabin filter replaced (Mann Ferocious) Plugs (Bosch OEM) Front and rear diff oil replaced (Redline 75W90, Original Porsche replacement drain plugs) Transfer case oil replaced (Redline D4 ATF, Original Porsche replacement drain plugs) Front brake and rotors replaced (not 160k service, but was needed) (Pagid Brakes and Rotors with new OEM hardware kit, new rotor screws, new sensors Front wheel bearings replaced Cleaned Throttle Body and replaced the gasket (Throttle Body Cleaner and Porsche Gasket) Inspected Serpentine belt (looks good)
In a couple of weeks:
Replace coils (all 8 were cracked when I replaced the plugs) Transmission Oil, filter, pan gasket, filter gasket, drain plug, pan bolts (All original Porsche parts, Toyota Type T-IV oil, would using RL D4 ATF be risky considering high miles and seals not being exposed to full synthetic oil? Also, the transmission fluid and filter were never replaced, yes I know, a big mistake) Hydraulic Fluid Reservoir replacement (Original Porsche, with Pentosin CHF202, how much oil do I need?) Fuel filter replacement (Siemens VDO OEM) Torque Strut mount (original is completely worn out, replacing bushings from ECS) Hydraulic Engine mounts and transmission mount (Lemforder or OEM?) Any other recommendations?