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Registered
Join Date: Oct 2000
Location: agoura hills, ca 91301
Posts: 2,634
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I use Mobil-1 on my Porsche. However, I do have a professionally rebuilt engine. Super clean so far.
I've been using full synthetic since the 80's or so. My rule has been.....
Use Mobil-1, if no leaks, great and stick with it.
If M1 leaks, use Castrol (synthetic, of course!) I think Castrol came in #1 when rated/tested by Consumer Reports.
1. Small leak will become drips.
2. Hard to explain, but I smell
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