SimonC

My Euro 80S does not have a catalyzer (and sounds great). But, since leaded fuel is no longer available in Europe, what should I do? Add something, leave alone?

I have an old Triumph convertible, and the advice there is not to bother with any additives. Apparently, those engines build up a protective coat on the valves, which means you can go unleaded for a long, long time, once they have have drunk enough lead earlier.

What is the advice for an early 928 in Europe?

SimonC

Go-carter

98 unleaded is what I've been told. I think the User Manual states either 93 or 91 as lowest. But unleaded it is, for sure.

R.Pires

Hi,

Definitely 98 unleaded, and no need for lead substitutes.
My owner’s manual only makes a reference to don’t use fuel with LESS than 98 octane.

Regards

Hilton

All Porsche's since about 1977 have hardened valve seats - can use unleaded with no modifications or issues on all 928's.

SimonC

Thats great. The previous owner had been using some swedish additive, which I didn't like the look of, so its nice to be able to drop that.

Thanks for the answers.