Discussion
Not sure about the Focus RS specifically, but most Turbocharged performance cars that have 98 Ron as a recommendation are 'mapped' to suit it. Most modern cars also have knock sensors, so if you are stuck with 95 the car will wind back the ignition (reducing performance) if it detects pinking or knock (which is caused by lower octane fuel).
It wont hurt it, but you shouldn't make a habit of it, and you should avoid caning it with 95 in the tank
It wont hurt it, but you shouldn't make a habit of it, and you should avoid caning it with 95 in the tank
Regular unleaded is 95.
Super unleaded is usualy 97
Tesco do a version of super unleaded that is 99 , its labelled at the pump as such
BP Ultimate is 97
Shell optimax, hmm not sure , I think its 98 ?
My TVR is tuned for 98, runs fine on 97 , better on 99. I wouldnt put 95 in it
In a modern motor you will have knock sensors and the ECU will re-tune the car to work with whatever you stick in it so it *should* run fine on 95.
Super unleaded is usualy 97
Tesco do a version of super unleaded that is 99 , its labelled at the pump as such
BP Ultimate is 97
Shell optimax, hmm not sure , I think its 98 ?
My TVR is tuned for 98, runs fine on 97 , better on 99. I wouldnt put 95 in it
In a modern motor you will have knock sensors and the ECU will re-tune the car to work with whatever you stick in it so it *should* run fine on 95.
tattymarbots said:
hi
is regular unleaded ron 95
just bought focus rs and book says use ron 98
i am guessing this is super unleaded or shell v-power
will it cause damage if i use regular unleaded
cheers
steve
Yes regular is 95, you need to use Super. If you dont use super, then you could cause detonation by the fuel exploding too quickly under boost and if it keeps happening has been proven to blow your engine to bits. If your car has a knock sensor then it can detect this and retard the ignition timing or lower the amount of boost, or both, resulting in less power and sluggish performance off boost.is regular unleaded ron 95
just bought focus rs and book says use ron 98
i am guessing this is super unleaded or shell v-power
will it cause damage if i use regular unleaded
cheers
steve
Best fuels I have found for turbocharged cars is either Shell V-Power or Tesco Super 99.
Puddenchucker said:
tattymarbots said:
is regular unleaded ron 95
Yes.tattymarbots said:
will it cause damage if i use regular unleaded
No, not on a modern car, but you will lose power (typically about 5%) and have small increase in fuel consumption.tattymarbots said:
hi
is regular unleaded ron 95
just bought focus rs and book says use ron 98
i am guessing this is super unleaded or shell v-power
will it cause damage if i use regular unleaded
cheers
steve
It probably won't cause damage, but if the engine is tuned to run on 97 and over you may lose performance when the ECU adjusts the igintion timing to compensate.is regular unleaded ron 95
just bought focus rs and book says use ron 98
i am guessing this is super unleaded or shell v-power
will it cause damage if i use regular unleaded
cheers
steve
Stick V-Power in it.
Slightly off topic, but I was wondering to myself which is best out of the 99 Octane fuels- V Power or Tesco 99, so I had a look at the data sheets:
V-Power
Tesco 99
I seems to me that Tesco don't give "typicals" but their fuel may just edge it. One big difference is the amount of Sulphur in them- V-Power may well be advertised as being involved with Ferrari racing, but it certainly wouldn't be put anywhere near an engine with Nikasil bores!
V-Power
Tesco 99
I seems to me that Tesco don't give "typicals" but their fuel may just edge it. One big difference is the amount of Sulphur in them- V-Power may well be advertised as being involved with Ferrari racing, but it certainly wouldn't be put anywhere near an engine with Nikasil bores!
Twincharged said:
Slightly off topic, but I was wondering to myself which is best out of the 99 Octane fuels- V Power or Tesco 99, so I had a look at the data sheets:
V-Power
Tesco 99
I seems to me that Tesco don't give "typicals" but their fuel may just edge it. One big difference is the amount of Sulphur in them- V-Power may well be advertised as being involved with Ferrari racing, but it certainly wouldn't be put anywhere near an engine with Nikasil bores!
used Optimax/vpower in my old Puma 1.7 for 2 years of hard use and it never caused and issue and that had Nikasil liners.V-Power
Tesco 99
I seems to me that Tesco don't give "typicals" but their fuel may just edge it. One big difference is the amount of Sulphur in them- V-Power may well be advertised as being involved with Ferrari racing, but it certainly wouldn't be put anywhere near an engine with Nikasil bores!
RobCrezz said:
Twincharged said:
Slightly off topic, but I was wondering to myself which is best out of the 99 Octane fuels- V Power or Tesco 99, so I had a look at the data sheets:
V-Power
Tesco 99
I seems to me that Tesco don't give "typicals" but their fuel may just edge it. One big difference is the amount of Sulphur in them- V-Power may well be advertised as being involved with Ferrari racing, but it certainly wouldn't be put anywhere near an engine with Nikasil bores!
used Optimax/vpower in my old Puma 1.7 for 2 years of hard use and it never caused and issue and that had Nikasil liners.V-Power
Tesco 99
I seems to me that Tesco don't give "typicals" but their fuel may just edge it. One big difference is the amount of Sulphur in them- V-Power may well be advertised as being involved with Ferrari racing, but it certainly wouldn't be put anywhere near an engine with Nikasil bores!
Gassing Station | General Gassing [Archive] | Top of Page | What's New | My Stuff