Jamz3k

How does it improve the performance of an N/A car?

I ended up putting 30quids worth in my car by accident a few days ago and with the tank pretty dry at the time, it only seemed to take a few short journeys until I noticed a difference. The car seemed a lot more responsive especially at lower speeds were it could sometimes feel a bit jerky.

Seeing better mpg as well on my journey to work too!

But how?

sovietspybob

iTrader: (3)

Unusual to see results so quickly but as long as your ECU can 'learn' to advance the timing due to more det resistant fuel you should get more power. My old car was mapped for 100RON in japan (Integra DC5) so i only ever ran it on 99 over here, but other owners said they ran like a bag of nails on standard 95RON fuel.

chocolate_o_brian

iTrader: (22)

I'm suprised none blew up even with Hondas uber reliable engines. If mapped for a fuel, you run it on that fuel or getting the map retarded to cope with less.

James: I'm currently trying out V-power on my old Merc barge. 95 saw 20 mpg lol, V-power has seen it rise to nearly 21 It's only a 2.3 litre engine too

SRSport

I am surprised that you can feel any improvements in a car unless it is designed/mapped to take advantage of Super fuels. I have done quite a bit of testing between shell 95 and 99 with a 1.2 Polo, Ford Cougar V6 and Impreza Hawkeye RS.

When testing them I have driven 1000s of miles and I normally see variation of MPG measurements of 1 but the 99 is always at the top end of that one, for example the most recent one Ive done with the Hawkeye over 250 mile trips I saw 34mpg, 34mpg, 34.5mpg on 95 and 35mpg on 99, I cant 'feel' any difference when driving to be honest with regards to power, responsiveness etc Im afraid.

SRSport

Just to add I had a good chat with an Audi R8 driver in the shell forecourt and noticed that he was filling up with 95. When I asked him why he wasnt using V power he remarked that he could tell the difference. Heres a thread I started on this

https://www.scoobynet.com/other-marq...n-audi-r8.html

Jamz3k

My car only has a 1.6 twinspark engine in it but I really do think it makes the car drives better, defo loses spots in the rev range were the car would generally be a bit hesitant. Doesn't feel any faster mind but defo a much smoother drive.

On the other hand, Tescos fuel really does make my car drive like pure **** as does the GO fuel. Now in NI we apparently get our fuel from the exact same depo regardless of what the name is above the petrol station so I find this really odd.

SRSport

What is twin spark and what does it do?

brendy76

iTrader: (6)

My missus old ka used to be very picky about which fuel it ran well on, cheaper fuel pinked like hell under any load, the better fuels ran normally but never noticed any better mpg.

Jamz3k

Its the petrol engine they used in the previous generation of Alfa Romeos. It is a 4 cylinder engine with 8 sparkplugs which work in a baldrick style cunning way to produce a bit more power out of a humdrum engine, I don't think it really worked though!

SRSport

lol, thanks. I had always wondered what that meant, just to lazy to gooogle it.

Andy M3

My bike has a better throttle response and does more to the gallon on Optimum...

Frosticles

iTrader: (1)

My MK2 Escort has to run 97 or preferably 99 RON due to it's compression and state of tune. Pinks it's **** off on 95.
Now, where's the meths.

tony de wonderful

It won't unless the engine is running a very high compression ratio and is tuned to run on higher RON fuels.

In actual fact the higher RON fuel contains less energy so could reduce performance.

Jamz3k

What is pinking?

pinkypurkhardt

iTrader: (9)

det

markjmd

iTrader: (11)

"High-end" petrols like Ultimate, Vpower, Excellium or whatever aren't just higher RON, most of them also have higher amounts of solvents and other additives, which are supposed to gradually clean the gunk out of injectors and other fuel system components, and/or stop the gunk building in up in the first place. On an N/A car which doesn't actually need the higher RON just to run normally, you could probably achieve much the same effect by putting in a dose of a fuel-system cleaner like cata-clean every few months or every few thousand miles (and filling up on ordinary 95RON in-between).