its been 3months after i tryed to use 98 octane fuel and....

[rjastra]

in general i fill it up with vpower 98 but yesterday i filled up with shell 95, and there was a huge difference between them...

Oh really I find that hard to believe

[tomtom]

i use caltex day to day. because i shop at woolworths hehe...



I'm pretty sure someone posted an article about the different octanes of fuel that pointed how using 98 on a car designed to run 91/95 is a waste as the octane refers to the fuel's resistance to compression... so if your car (lets just make a scale up here out of 10...) is rated to compress the fuel up to 2/10... but you put in fuel that can resist compression of 9/10....that aint gonna do anything but burn your wallet unless you can make your motor compress the fuel more before igniting (which i'm guessing would result in more power).

I've never put 98 in my car only 95 (as recommended by the user manual for better performance).

*shrug*

[droodles]

Is it ok to have half a tank of 91 fuel and then fill up the rest with 95/98? Or would that explode?

[sooty]

Is it ok to have half a tank of 91 fuel and then fill up the rest with 95/98? Or would that explode?

that's fine mate

[droodles]

that's fine mate

oh good, cause I thought about trying out higher octane fuel but I thought I'd have to drive the car till the tank was near empty and then fill it up LOL

[hazrd]

i use caltex day to day. because i shop at woolworths hehe...



I'm pretty sure someone posted an article about the different octanes of fuel that pointed how using 98 on a car designed to run 91/95 is a waste as the octane refers to the fuel's resistance to compression... so if your car (lets just make a scale up here out of 10...) is rated to compress the fuel up to 2/10... but you put in fuel that can resist compression of 9/10....that aint gonna do anything but burn your wallet unless you can make your motor compress the fuel more before igniting (which i'm guessing would result in more power).

I've never put 98 in my car only 95 (as recommended by the user manual for better performance).

*shrug*

Woolies staff discount everytime I fill up FTW

I can tell u though Tom, we always put 98 in our 2.2, ur right u don't notice the performance, but I tell u what, we put 95 in it a few weeks back, and lost about 40 odd kms of fuel consumption!!!

[jlgu]

I found that you notice the performance and consumption difference, only when you drive the car hard. noise level does drop significantly when higher octane fuel is used

[droodles]

Yeah...after going from 91 to BP 95 I've noticed the economy has been a lot worse. I filled it up on Wednesday and the needle has already moved down quite a notch, it's a bit past the white line on the fuel gauge.

[lee]

In my stock TS 1.8 Astra, I don't notice a massive difference between 98 and 95, but if I use 91, i get about 30ks less out of the tank . If your car is modified at all, higher octane fuel is a must.

[ChrisMaz]

I'll be using 91 from now on. I want it nice and loud