p16uly
Guest
You get better petrol from a garage with a high turnover than from one where it had been sitting in the tanks for ages.
-
Hey Guest one of our sponsors Progressive Parts is running Black Friday and Cyber Monday offers - more details here
TSI and high octane fuel.
- Thread starter loonymoon
- Start date
Our cars have it marked on the filler cap that 95 ron is fine. Its not a highly tunned race car, just a normal "hot hatch".
Sorry if you don't agree but I haven't had any problems from day one running on 95 ron. Nor misfires etc
Spend sh*t loads on V power if it makes you happy, sure it will make the marketing department at Shell happy they are doing their job well
I got one of those chain emails once saying something to that effect, and also to try to fill up in the morning as when the fuel is colder it's specific gravity is greater and less vapour is produced so a litre is more like a proper litre.
It also said to use the slow setting on the pump to deliver the fuel to the tank as it is less likely to develop vapour.... however I tried that once recently took forever to fill the tank on my ibiza and I somehow managed to put 47 litres into my 45 litre tank.... Mind you I did get my best ever mileage out of that tank....but I don't think I'll be doing that again.
Not sure how true any of that is...
My car also says 95 above is fine... I've filled it only 4 times so far, twice with premium fuel and twice with normal 95 RON, I think there's a small difference in mpg but I haven't yet calculated whether it outweighs the increase in fuel cost... but if it breaks even then I'll be using premium for the supposed other benefits of cleaning and perhaps slight bhp increase. The 1.2 TSI isn't even a hot hatch... perhaps warm hatch...LOL
I don't agree cause I have the facts, you don't agree cause you are misinformed.
2 very different things here.
7p a litre more expensive, 45 litres a week to fill for me, gives me about £168.80 a year more to run v power in an engine designed to take v power.
if it gives me 30 miles to a tank more which it seems to. then 1560 miles more a year. at a generous 40mpg that is 177 litres saved every year which is 230 quid saved.
Look at your filler cap. It states 95 is fine, or maybe you want to take that up with Seat seeing as you know exactly what our engines are designed to take.
I am not arguing that you can put V power in, do it if that's what makes you happy. I'm just saying I don't think it pays for itself. All your figures are all well and good but there are a few "ifs" in there.
Our cars can use either - FACT.
What I chose to use is up to me and the same for you all
I am not arguing that you can put V power in, do it if that's what makes you happy. I'm just saying I don't think it pays for itself. All your figures are all well and good but there are a few "ifs" in there.
Our cars can use either - FACT.
What I chose to use is up to me and the same for you all
It states 98 on mine, the manual recomends 98 but will allow 95 this is due to the adjustable knock sensor in the engine allowing more ignition advance with higher ron rated fuels. which is what it will be designed for! It can retard the ignition to 95 but this is less economic and reduces power by a fair bit tbh.
You cannot argue with physics and mechanics that the engine is designed for 98 and it will always run best on 98 even if you cannot feel the difference the engineering is there.
If this was a 1.4 NA ibiza then yeah i wouldn't bother. but a 1.4 Twincharged kicking out 180- 200bhp then i would definitely run it on the good stuff.
You cannot argue with physics and mechanics that the engine is designed for 98 and it will always run best on 98 even if you cannot feel the difference the engineering is there.
If this was a 1.4 NA ibiza then yeah i wouldn't bother. but a 1.4 Twincharged kicking out 180- 200bhp then i would definitely run it on the good stuff.
AFAIK the 1.2TSI and the Cupra have different octane requirements.
The 1.2 TSI is designed to use 95 RON (and possibly 91 with reduced performance).
The Cupra 1.4TSI is designed to use 98 (and 95 with reduced performance).
We had some discussion about the 1.4 FR octane requirements earlier and the information from VAG seemed contradictory.
Discussing 1.2TSI and 1.4TSI engines on the same thread is probably leading to some confusion.
As Nutkin says the knock sensor will lead to some ignition retard if lower octane fuel is used. But that does not mean that higher octane than that for which the engine is designed will give any benefit.
...... Just crossed over with your post loonymoon!
The 1.2 TSI is designed to use 95 RON (and possibly 91 with reduced performance).
The Cupra 1.4TSI is designed to use 98 (and 95 with reduced performance).
We had some discussion about the 1.4 FR octane requirements earlier and the information from VAG seemed contradictory.
Discussing 1.2TSI and 1.4TSI engines on the same thread is probably leading to some confusion.
As Nutkin says the knock sensor will lead to some ignition retard if lower octane fuel is used. But that does not mean that higher octane than that for which the engine is designed will give any benefit.
...... Just crossed over with your post loonymoon!
Agreed.
So for the 1.2 TSI I'm not going to be causing any issues using 95 RON, I may get better mpg and perhaps slightly better performance on higher. I need to work it out and calculate if it's worth my while doing it.
For the 1.4TSI then it does seem to make a more of a difference and 98RON is recommended. The 1.4 has a supercharger where as the 1.2 doesn't could this make a difference as well as the state of engine tune?
So for the 1.2 TSI I'm not going to be causing any issues using 95 RON, I may get better mpg and perhaps slightly better performance on higher. I need to work it out and calculate if it's worth my while doing it.
For the 1.4TSI then it does seem to make a more of a difference and 98RON is recommended. The 1.4 has a supercharger where as the 1.2 doesn't could this make a difference as well as the state of engine tune?
That's what our 2011 MY Cupra says on the filler cap, I felt guilty putting 95 in it earlier so I think we might have to bite the bullet and use v power.
No sign of any misfires since we picked it up a week and 400 miles ago.
Mine Reads 98/95 also MY11
Ive put one tank of Vpowerinto mine and didnt notice a difference really, mpg was a little better but that could be down to any number of things. I belive higher octane fuels will have added benifits but I think they will be quite small.
Ive seen some test/reports of cars ran on dynos with 95 then 98 as well as I think a 5th gear segment about fuels and on the normal family car, no difference, on the sports car, almost no difference I think but on a Subaru Sti it gained a few bhp and torque when ran on the higher stuff.
Petrol is so expensive as it is its a shame I cant get the most out of it by using Vpower but I reckon I could remove the tools in the back and get a lightweight space saver rather than a full size spare and save more mpg and have a better power/weight than the higher octane fuel if used over a tank.
I think the Jury will always be out on this pepole will always think one thing or another.
Jay
Ive put one tank of Vpowerinto mine and didnt notice a difference really, mpg was a little better but that could be down to any number of things. I belive higher octane fuels will have added benifits but I think they will be quite small.
Ive seen some test/reports of cars ran on dynos with 95 then 98 as well as I think a 5th gear segment about fuels and on the normal family car, no difference, on the sports car, almost no difference I think but on a Subaru Sti it gained a few bhp and torque when ran on the higher stuff.
Petrol is so expensive as it is its a shame I cant get the most out of it by using Vpower but I reckon I could remove the tools in the back and get a lightweight space saver rather than a full size spare and save more mpg and have a better power/weight than the higher octane fuel if used over a tank.
I think the Jury will always be out on this pepole will always think one thing or another.
Jay
Jay if you have been using 95 octane you will need to run more than one tank of vpower. You will still have remnants of old fuel in your lines.
Similar threads
