Normally,for me to buy super unleaded means around trip of 40 miles but I noticed today as I flew past my local garage that they had a new pump selling lead replacement. Is this the same as super. Forgive stupid question but I did try to ask but the wrinkly serving at the till apparently normally only worked behind the Post Office counter and anyway could n't tell me about anything that happened since 1955.

 

I would have thought lead replacement petrol was a replacement for leaded petrol. So I doubt if it is unleaded .

 

Lead replacement is unleaded but with extra additives to help ex-leaded cars. IIRC some cars like the old MG's struggled with unleaded when leaded petrol was withdrawn, caused issues with a seal or something??

Anyway what I am trying to say is that lead replacement is probably not SUL and a variant of normal UL.

 

LRP is essentially unleaded petrol with a RON of 95 to 96, which has had anti-valve seat recession additives included to protect leaded engines from valve and valve seat damage.

 

Different stuff altogether.

you need fuel that has at least 97 RON (usually called super-unleaded but goes under many names) higher RON is OK (up to 100)

Ordinary unleaded and LRP is usually 95 RON.

 

Is that as in LRP? I thought they were phasing that out. It was meant for the older "classic" car iirc to replace the old 4 star petrol, so that you didn't have to get your valve seats hardened. Not many people use it because it has no BS number.

or is this something different & I'm talking a load of horse manure?

 

Perhaps you should write a Wikipedia article on this Mike

 

I reckon I probably should.

 

Don't use LRP

 

Don't use LPG, either.

hth