Having just added my original 1978 Porsche 928 to my collection, I now have 6 cars in the garage and my wife’s car sits outside, so I guess it’s time to part with my 1997 GTS which I bought new and has 26K miles on it. Any interest, contact me via email b
just changed spark plugs for first time on my 97 GTS and mechanic showed me an endoscope photo of carbon on cylinders heads. He suggested 100 octane gas , driving it more, and possibly some additive. Any suggestions??
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