I initially used Sainsburys SUL and after a month or 2 the car ended up in the garage with violent kangarooing and the CEL on.

Dealer flushed the system, and said this was common for HOndas using Sainsbury's fuel - they told me never to use it again.

 

I was under the impression the "supermarket" fuels have the same RON levels as the Petrochemical guys but do not have a lot of the detergents and other additives.
Might explain the Honda/Sainsbury comment.
I run my S on either Optimax or Ultima because an engine like this deserves some TLC! Only once have I used SUL out of a desperate need to keep going

 

I'll add my 2p. In my last car I always used Opti but this time around I have stuck with Esso SUL. To-date I haven't noticed any difference.

 

I always use Opti if I can cos I like Red and yellow - it makes me feel warm, and i get shell plus points

On the rare occasion i have to put an alternative in I put Ultimate, or another SUL in. But i don't bother about the cost, cos I dont pay for it.

Now, isnt there something about MON too? I think BM wrote a lot about this in the past, might be worth searching for those inquisitive types for what Turtle might have posted on fuels before

 

There were similar tests (by the AA ?) conducted in germany using Shell V Power 100 RON ULP

Translated German report on V Power 100


-- Paul

 

I'm not surprised as I have heard that supermarket fuel doesn't have the detergent additives you get in branded fuels - sometimes, you get what you pay for!