Josh Slade
Club Member
Hi there, i'm very new to these cars and going to be purchasing one very soon, are these engines fine to run on UK unleaded petrol?
Thanks
Thanks
As far as I know it's a lot earlier than that Jon. Only very early 240s shouldn't be run on unleaded. I'll search.
Edit. It's a minefield on here - not looked anywhere else. The consensus is that you won't have a problem with unleaded.
My search showed the clubs technical advisor confirmed valve seats were bronze until '77 at least on the UK cars.
If you run bronze seats with unleaded you will get accelerated wear. They aren't designed for unleaded. If you only do 300 miles a year, it'll be a good few years before you have a problem. That may be fine for you.
I ran a head with bronze seats for a few years and even with lead replacement additive the seats were visibly eroded after a few years.
I didn't find that detail I'm afraid.Do we know what engine number was 1st fitted with non bronze seats ie. the cut off?