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I've got a noisy gearbox...PO put in a fidanza flywheel which I think contributes a lot to the increased whine in low gears when coasting. I put in Swepco 210 (yes, 210 not 201) which is a bit heavier and it seemed to quiet it down significantly. I'd tried a number of gear oil prior to that and the guy that runs my local Porsche shop recommended the 210 and I won't go back.
As for engine oil - I'm a super fan of the Brad Penn 20W-50 racing oil. It's a little more expensive and I can't find it anywhere local so I buy a couple cases at a time, but it's well worth it. My car sips oil now, keeps very strong oil pressure and I can't find any leaks. It also contains the proper amount of ZDDP that these engines require. For a 20+ year old car - especially a high performance one - lubrication is not a place where I'm looking to save $20 when it's time to change them...
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