besides price and the word Super?
and can you just swap from one to the other?
2006-11-29 00:09:13 · 37 answers · asked by Anonymous in Cars & Transportation ➔ Other - Cars & Transportation
super unleaded works for old cars that dont normaly use unleaded fuel!
Dont use it in your unleaded car!
2006-11-29 00:10:52 · answer #1 · answered by str1der 3 · 1⤊ 14⤋
Super Unleaded
2016-10-04 03:14:24 · answer #2 · answered by ? 4 · 0⤊ 0⤋
Normal unleaded is 95RON, the standard for commercial vehicles in europe.
It differs in some countries, super unleaded is normally 97 RON, although TESCO's are now doing a 99 RON Bio-ethanol (which makes some cars go like stink).
On a basic level, the higher the RON, the more chemical energy is available for the combustion process, which in turn means a more powerful explosion, and higher power levels.
It is not worth using super unleaded in cars that do not have a knock sensor, as the ECU will not be able to adjust the timing (due to differing flash point of the fuel) to benefit from the higher octane.
As a general rule, very high performance cars (porsche, ferrari etc) are designed to run on super unleaded, using normal 95 RON will see a drop in performance.
BP Ultimate and Shell Optimax have both been proven to boost power, particularly in modern turbocharged cars. VW's new golf GTi turbo see's 15bhp by using the Optimax fuel.
You also get mariginally better fuel consumption, which all but offsets the price increase.
2006-11-29 01:43:36 · answer #3 · answered by Steven N 4 · 2⤊ 0⤋
Super unleaded has a higher octane rating, which actually relates to how smooth and clean the "burn" is if the fuel. Higher octane rating means improved burn, hence a little more power to the wheels.
You can swap as much as you like between one and the other, chances are unless your engine is specifically tuned for super unleaded (97 to 98 Octane rating), you won't see much difference.
There is now a new "breed" of super unleaded fuels, such as V Power from Shell, which is actually a vast improvemnt, and you will tell the difference, particulalry over the longer-term, in terms of engine efficiency etc. Slight improvements in economy and acceleration.
Mainly a marketing ploy, but hey, what isn't these days!
2006-11-30 21:58:19 · answer #4 · answered by BushRaider69 3 · 2⤊ 0⤋
As most of the other people have answered correctly. It's got a higher Octane level.
Which ACTUALLY means that it ignites more easily when exposed to an ignition source. The benefit of this is that the petrol is more volatile & burns faster & hotter by a marginal amount resulting in a more efficient use of the chemical energy...'more bang for your buck' sort of thing.
Not all cars are capable of using the higher octane grades as the ECU (car brain) in older and less powerful cars is not designed to utilise premium fuel and will simply treat the air/fuel mix as a standard '95' grade fuel giving no added benefit.
Some older (pre 1990) cars have a small 'link' in the engine bay to manually designate to the ECU which fuel is being used and so alter the 'map' - if set to '95' and '98' is used - no benefit, BUT if '98' is selected and only '95' is used it can result in slight engine damage as excess air is added resulting in too hot a mixture.
If you have a fairly modern, 'sporty' or 'muscle' car then it may be worth the switch - mixing them is OK, it will just result in a diluted premium / enhanced regular.
2006-11-29 22:35:49 · answer #5 · answered by creviazuk 6 · 1⤊ 0⤋
They are different octane. That means the super unleaded is cleaner. The higher the octane, the cleaner the gasoline is, and the hotter it burns.
You can swap from one to the other if you car is made to handle just regular unleaded. If you have a Cadillac, you should be putting premium in your tank at all times.
2006-11-29 00:13:34 · answer #6 · answered by Low Key 6 · 3⤊ 1⤋
unleaded is just that it is fuel that has not been refined as much as super unleaded ..personally i think that the version sold by shell in the UK is very expensive..last time i looked it was £2+ a LITRE..(mugs) it is road legal fuel..just a couple of steps away from the stuff they put in F1 cars(so i have been told) on a personal note..i think all cars in the UK from 2010 should have built in a duel fuel system either electric or LPG.or bio fuel.that would reduce carbon admissions buy a 1/2 in 5 YEARS..SO COME ON BRITISH GOVERNMENT WHY HAVENT YOU DONE THIS ??
2006-11-30 22:22:32 · answer #7 · answered by hondanut 4 · 0⤊ 0⤋
I don't know what str1der is talking about. The key word is "UNLEADED" and that's exactly what it is, wheter it's regular, plus or super. The difference is the octane rating no more, no less. Put in the grade fuel that your vehicles manufacturer reccomends. A commom myth is ones car runs better on super even though it's designed for regular. The A.S.E. has conducted numerous tests on this myth. The end result is put super in a car designed for regular and all your doing is making the oil company richer. Of course if you have modifications made to your engine (intake, ignition, chip, exhaust etc.)then you will have to experiment a little to find out what's best for you.
2006-11-29 00:12:21 · answer #8 · answered by bcre8iv 3 · 7⤊ 1⤋
In the u.k unleaded petrol has an octane rating of 95 minimum and super unleaded has an octane rating of 97 minimum. If your car is a 1.1 litre ford fiesta then you are wasting your cash using super unleaded. If your car is a high performance muscle car then it is worth the few extra pence per litre.
2006-11-29 00:18:27 · answer #9 · answered by Anonymous · 3⤊ 1⤋
In contemporary engines, the top classification gas (in lots of cases called 'large' Unleaded or comparable) has a bigger octane variety. You get a reasonable develop in MPG over the path of the tank and a reasonable overall performance develop too. the counsel approximately pinking is partly appropriate, even nevertheless in contemporary vehicles it is not an argument. certainly, it works out the comparable in terms of cost over the path of a tank. If i will discover the money for it, I placed severe octane gas in my motor vehicle, if i won't be able to i do no longer subject. in case you do no longer comprehend something approximately vehicles, the three maximum serious issues are: a million) do no longer force your motor vehicle problematic whilst the engine is warming up. Takes approximately ten minutes - inspect the temp. gauge on your sprint. 2) consistently purchase the main costly oil you could discover the money for. 3) consistently examine your oil each and each month. in case you have a popular motor vehicle (esp. German or jap), examine the oil usually and go person-friendly on the grasp, it's going to go on for nicely over a hundred and fifty,000 miles a minimum of.
2016-12-14 08:52:44 · answer #10 · answered by shoaf 4 · 0⤊ 0⤋
Super unleaded is designed for sports engines, for the average motorist it will make no difference to the performance or fuel consumption of your car. It will just cost you more to fill up without any benefit to you or the car!
2006-11-29 02:16:22 · answer #11 · answered by psychoticgenius 6 · 1⤊ 0⤋