Unleaded or Super Unleaded?

[yabadaba]

The owners manual for a LS1 5.7ltr Camaro states that 91 octane or higher should be used. Given that octane is measured differently in the UK and that (I believe) 91 in the US is roughly equivalent to 95-96 in the UK, I guess I'd be fine to use standard unleaded at 95 RON. But do you guys find any real benefit from filling up on super unleaded instead....or is that just a waste of money?

[yabadaba]

Thanks for the feedback guys. I'll stick with regular unleaded.

On a side note, I've just discovered that it's official mpg figures are exactly the same as my wife's BMW 525i (according to the US Govnt's fuel economy site). Now the 525 isn't exactly frugal with the juice, but it isn't horrific either. I've got a feeling that my 'soon to arrive' Z28 won't exactly be the gas guzzler that some of my friends think it will be....and it'll be a lot more fun than what they're driving :-)

[yabadaba]

LuS1fer said:

Mine was an auto and would return about 20mpg in daily commuting and anything up to 30 on a run if I was careful. I wasn't very careful though. You might want to think about strengthening rails that weld on undeer the car and stop the car being so floppy, a Bilstein BTS suspension kit and some bigger wheels (18's look best).

Funny you should mention the wheels because they are the only thing I'm really not to keen on. The stock 16's just don't fill the rear arches enough, so was thinking of buying a set of 17's....hadn't considered 18"....but maybe I should. Some of the American Racing wheels look good, but I'll probably have to wait a while as new wheels will also mean new tyres and the whole lot will come to quite a pretty sum!

[yabadaba]

LuS1fer said:

True but some are surprisingly affordable. I used these guys in 2003 and the wheels arrived within the week. Using tyres like Kumhos keeps the initial cost down.
http://www.tbyrnemotorsports.com/ls1/wheelstires.h...

Hmm...interesting....nice link with some attractive prices. To be honest, I've never dabbled with after market wheels before, so if I was to look into a set of 18's, what should the other measurement be....9.5, 10.5? I take it that's the width and will determine what tyre choices are available....what did you have 18x10.5"?