It was 83.9 for super at my local esso garage this morning when regular UL was 79.9. Petrol will not be getting any cheaper. If I was to run on reg UL it would save me around £600/yr with the current mileage I do(unfortunately not enough to justify another more economical car)

Just what would be the expected performance drop if the car was mapped for regular UL? Car is currently stg1 running around 280bhp.

What would be the difference if the car was running stg3?

Would you also see a drop in response or any other negative performance characteristics other than a drop in pure power.

 

to save £600 a year at 4p a litre difference would mean you are doing around 66,000 miles a year... in an Escort Cos

 

Not buying that rear beam would've saved you £600 as well!!!!!!!!!!!!

 

pmsl - car does more to the gallon on more efficent fuel btw - just to throw a spanner in the works

 

opps missed something out there, its actually more like £105/yr so forget the whole thing

Actually, would still like to know

 

 

I always thought it was a bad idea to run any Cossie on regular unleaded. Only Optimax for mine.

 

Kev, any news on the foglight grills?????????

 

SUL runs better than NUL, BUT, as yours is chipped, it most likely HAS to run on SUL variants.....otherwise the performance difference is det' or no det'

 

I know that, but what I am asking is if i had a chip specifically mapped for UL rather than SUL what would be the performance difference?????

 

up as I'd still like to know please

 

well unl was down 2p today for me and optimax was down to 84.9 p also down 2p from last week which made me very happy as today i got 45p's worth more fuel for £20 god its still a rip off!....

when is someone gunna do a lpg conversion on there rs?????

 

SUL is at the bargain price of 80.9p a litre here... optimax is a full 5 pence more!

 

Dunno, but I find I get better economy from the Super Unleaded.

 

I thought reg u/l caused detonation problems and all cars should run at least super u/l if not optimax?

 

Re-read the above, the question is 'what would be the performance difference if the car was mapped for UL', i.e the map would make running the UL safe for the engine.

Paul

 

Paul, ever get the feeling you're talking to yourself here

 

dont know but why dont u just try it and find out!...or think about how much the conversion would cost and then discover that it cost more to convert to crap fuel than what it does to run on good fuel!....

if ya really want to be part of the rep crowd and ram the cheap hose in then add some occtane booster once ya leave the forecourt!!!!!!!

 

Absolutely, I even think there's an echo echo echo echo echo echo cho cho cho cho cho cho ho ho ho ho ho ho o o o o o o o o o

 

Sorry fella, I'm not a mechanic, didnt think a chip or re-map would make any difference to the internals of the engine responding to sh/t fuel?