Super Unleaded
Discussion
nottyash said:
Caulkhead said:
It's a turbocharged petrol engine producing more than 100bhp/litre then. Even if it doesn't have to have super, there's a good chance it will benefit from the higher octane. I'd go with super.
No it wont at all. Only if its mapped to run on Super.For instance our R53 Mini Cooper S John Cooper Works said it was to be run on Super because it was mapped for it.
On a diesel Bio Diesel has a higher cetane value than regular diesel. Using your theory it would benefit a diesel car to run on it
nottyash said:
Caulkhead said:
It's a turbocharged petrol engine producing more than 100bhp/litre then. Even if it doesn't have to have super, there's a good chance it will benefit from the higher octane. I'd go with super.
No it wont at all. Only if its mapped to run on Super.For instance our R53 Mini Cooper S John Cooper Works said it was to be run on Super because it was mapped for it.
On a diesel Bio Diesel has a higher cetane value than regular diesel. Using your theory it would benefit a diesel car to run on it
If the ECU is smart enough to realise the fuel has more detonation resistance and change the ignition timing until it just starts detecting knock(then presumably backs off a little) then, the car will benefit from super.
simoid said:
Experiment sire, I'm undergoing a V-power experiment with my 182. It's supposed to be a 400 mile per tank challenge, but I can't go a journey without flooring it at least once so it's an unrealistic challenge 
Engine does 'feel' nicer, however, and Renault recommend 98 ron.
How you getting on with this?Engine does 'feel' nicer, however, and Renault recommend 98 ron.
I've done around 140 miles in my 172 this week and have 300 left on the "remaining till empty" counter, and MPG is 40.2
I stand corrected.nottyash said:
No it wont at all. Only if its mapped to run on Super.
For instance our R53 Mini Cooper S John Cooper Works said it was to be run on Super because it was mapped for it.
On a diesel Bio Diesel has a higher cetane value than regular diesel. Using your theory it would benefit a diesel car to run on it
Yes it will. Modern cars have sensors to detect the quality of the fuel they are using and adjust the fuel air mixture accordingly. Therefore if he put super unleaded in his ECU will change ths combustion cycle slightly to compensate for this giving a slight increase in power and torque.For instance our R53 Mini Cooper S John Cooper Works said it was to be run on Super because it was mapped for it.
On a diesel Bio Diesel has a higher cetane value than regular diesel. Using your theory it would benefit a diesel car to run on it
Having said that i'm not sure wether a smart car deserves the extra cost of super unleaded for every tank full in the first place even if it is a 'brabus'?? for example i own an audi tt roadster 225 which is an engine over the 100bhp/litre mark and i only put a tank of super in once every two months at the most just to give the injectors etc a clean out as the fuel contains cleaning agents which the 95RON doesn't. I dont really notice any significant gains in power or torque i just like the idea of keeping the engine clean, so maybe just try the two and see wether the cost vs performance increase is worth it?
swiftwill said:
i only put a tank of super in once every two months at the most just to give the injectors etc a clean out as the fuel contains cleaning agents which the 95RON doesn't
Shell and BP dohttp://www.shell.co.uk/home/content/gbr/products_s...
From the moment you fill your car with Shell FuelSave Unleaded, you could start to benefit from the new fuel economy formula. That’s because it’s enriched with Shell Efficiency Improver combined with a special detergent package, designed to improve fuel economy from the very first drop.
http://www.bp.com/retail/sectiongenericarticle.do?...
But new BP regular fuels have been formulated with advanced cleaning properties. Unlike some fuels, they won't leave harmful deposits in your engine. In fact, they are specially designed to protect against further deposits taking hold. So they can help to keep your engine fitter and healthier and performing as the manufacturer intended.
My Corrado advises me to run on a minimum of 97,
At shell VPower is 8p more than standard petrol, I do get better economy on 99 than I do on 97, and have tipped 40mpg in hot weather in the car running on shell, return journey on Texaco 97 I was only returning 36mpg for similar conditions.
48 miles extra over 12 gallons, or .87 Miles for every Litre in ideal conditions.
Feel slightly geeky after working that out, but it's something you should test real world to get your own results.
At shell VPower is 8p more than standard petrol, I do get better economy on 99 than I do on 97, and have tipped 40mpg in hot weather in the car running on shell, return journey on Texaco 97 I was only returning 36mpg for similar conditions.
48 miles extra over 12 gallons, or .87 Miles for every Litre in ideal conditions.
Feel slightly geeky after working that out, but it's something you should test real world to get your own results.
Going back to this:
BIG DUNC said:
...for the lesser models in the range, it states "premium unleaded min 95 RON". For the engine varient I have it states "super unleaded min 95 RON".
I'd say that sentence isn't aimed at buyers in the UK- in Australia "Regular" unleaded is 91RON, "Premium" is 95RON and "Super" is 97RON.nottyash said:
Caulkhead said:
It's a turbocharged petrol engine producing more than 100bhp/litre then. Even if it doesn't have to have super, there's a good chance it will benefit from the higher octane. I'd go with super.
No it wont at all. Only if its mapped to run on Super.For instance our R53 Mini Cooper S John Cooper Works said it was to be run on Super because it was mapped for it.
On a diesel Bio Diesel has a higher cetane value than regular diesel. Using your theory it would benefit a diesel car to run on it
Hence if you run on 97, you should get more BHP because the ECU will adjust the engine accordingly?
Jonathan Legard said:
Mike - thanks for that. Much appreciated and taught me a few things.
So the myth about 'crappy American fuel' is just that? I've long heard that their diesel is of a lower cetane rating. Is that also based on such a glitch in measurement or is that actual?
Not sure about the diesel although I do know it has some differences.So the myth about 'crappy American fuel' is just that? I've long heard that their diesel is of a lower cetane rating. Is that also based on such a glitch in measurement or is that actual?
But the petrol myth is just that. They typically have 87 octane regular and 91 premium, although some states also sell 93 premium. But its not out of the question to even find 100 octane fuel at the pumps in some places.
But as Mike said above, these aren't RON figures. I think they are sometimes called PON (Pump Octane Number) as they are the average between MON and RON.
My Leon FR 2.0TFSI went better on super, performance, economy, and smoothness. It preferred Tesco99 to Optimax.
On my MR2 it seemes to make no difference, so I don't bother.
I thought my 54plate CooperS used to pop and bang more on the expensive stuff. But they run a "chuck a load of fuel in just to be sure" map at the best of times.
On my MR2 it seemes to make no difference, so I don't bother.
I thought my 54plate CooperS used to pop and bang more on the expensive stuff. But they run a "chuck a load of fuel in just to be sure" map at the best of times.
FamilyDub said:
I found that while SUL is more expensive, it's more efficient and lasts longer, so the 'it's more per litre' argument is somewhat redundant.
Tesco 99 + lots of driving = clubcard points WIN.
Tesco99 is awful petrol. Tesco 99 + lots of driving = clubcard points WIN.
Shell V power = Win. Even Sainsburys 97 is better than the artificially enhanced Tesco effort.
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