Italian tune up

reeac

Robisere wrote: »

What make/model of car?

Check the handbook and see what it says about Octane Ratings for the fuel it can take. If it shows as 95 and 98 octane can be used, then the ECU chip will have that capability.

I run my little Hundai iX20 on Shell V-Power and it certainly does go. But it also states in the handbook that it can use 98 octane and that this will give greater use of the twin cam, 125 bhp,12v per cylinders, light body. It certainly accelerates faster with 98 octane and I use that all the time now. This may answer some of your questions:
https://www.motorist.sg/article/96/95-vs-98-petrol-are-you-wasting-your-money-on-premium-fuel

Before the debunkers come along to tell me that it makes no difference, let me draw their attention to the engine figures above. And yes, it's a special that I was lucky to get. I wasn't after high top speed, only better acceleration and smoother running. I got that, but probably suffer a little on MPG, which I accept.

It's the 12 valves per cylinder that's making the difference.

fred990

Takmon wrote: »

I don't actually know how many cars are capable of adjusting to different octane fuel. But it's not very complicated for the cars ECU to adjust how it runs based on input from the sensors to get the most out of the fuel.

Mines 16 years old and does it. AMD said it would take a day or two after remapping on 98 ron fuel to adjust. My last timing belt change was a pig, I've done quite a few on the vw 1.8t but this one was nearly a tooth out! This particular belt wasn't the best for tolerance. I thought if the ecu can adjust for this it'll be good....ran as rough as hell/lumpy for about 60 seconds then smoothed out. Makes me wonder what new ones can do?

almillar

The higher octane fuels offers no advantage to any vehicle other than high performance cars that are specifically designed to run on it

Aw, thanks for the compliment. 350Z, Audi TT are high performance cars. Also the potent 1.2 Hyundai i20! Instead of generalisations, just check your manual, or your petrol flap! If your car says it prefers 97/98 RON, instead of the standard 95, use it. It's 2p per litre more expensive in Sainsburys. I intentionally make no reference to additives.

I have a modern (but not particularly sporty) car, are you seriously suggesting that I should be spending more money on 98 octane fuel?

RTFM! (or tell us your car!) - you're actually helping me make my point about generalisations.

Naaaa your miles off....I do not think Nissan made a fast Almera, EVER.

I found it hard to beat the 7.2 sec 0-60 time of my Almera GTi when I replaced it. Wolf in sheep's clothing.

Arklight

almillar wrote: »

Aw, thanks for the compliment. 350Z, Audi TT are high performance cars. Also the potent 1.2 Hyundai i20! Instead of generalisations, just check your manual, or your petrol flap! If your car says it prefers 97/98 RON, instead of the standard 95, use it. It's 2p per litre more expensive in Sainsburys. I intentionally make no reference to additives.



RTFM! (or tell us your car!) - you're actually helping me make my point about generalisations.



I found it hard to beat the 7.2 sec 0-60 time of my Almera GTi when I replaced it. Wolf in sheep's clothing.

My goodness that must have been something to behold.

andygb

reeac wrote: »

It's the 12 valves per cylinder that's making the difference.

:rotfl::rotfl::rotfl:
I reckon it must be a bit crowded in that cylinder head:eek: