I'm off on a trip round derbyshire in the new year sometime and I know how scarce SUL is around there.

Where the cheapest and best place to buy catalytic converter friendly millers octane booster mail order from?

I was going to fill up with normal 95 RON and then add a bottle of millers to bring it up to spec.

I would do a search but it's not there any more

 

Neil,
Demon tweeks at wrexham £2.98 per bottle.
Buddy

 

Millers Octane + 1 x Case [10 bottles] £22.20. (+ VAT & P&P) (£33.14 Inc VAT & UK Postage).

Recently reduced.