I read a thread on Bobistheoilguy.com that someone broke down Seafoam... surprise, surprise... it was mostly water with some petroleum crap left over from the refining process.

You can run simply a vac line between the intake manifold and cabin, the one just below the throttle body should be fine, and slowly induce a bit as you drive down the freeway.



I would probably put in a higher octane fuel and do some 'spirited driving' for a while to help blow the top end out. I have no knock in my 300SEL on 87 fuel.

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

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