Q: How much is 98 Octane?

[TwoSeven]

Or a FIAT whose engine is designed around MON octane ratings, not RON.

A FIAT is designed ?

I had an 850 sports coupe in my yoof. Wouldnt have thought that had any design in it - was a mental car.

[speedpro]

In Wellington last weekend I had a choice of 91 or 98 and being the cheapskate I am I put 91 into the mighty Legnum(1800 GDI). It started OK at the gas station but just up the road after stopping for 10 minutes it didn't want to know. Finally got going and it ran fine till I got stopped going up the Mangaweka hill (115Kmh, 20 points, $80). Same starting problem. Same at Waiouru and in Auckland. It was only difficult to start when hot. I've topped it up with 96 and it's better but still partly a problem. The car ran fine, it just was/is harder to start.

Higher octane definitely made my turbo Cefiro run better and respond better to (lots of) throttle.

[James Deuce]

A FIAT is designed ?

I had an 850 sports coupe in my yoof. Wouldnt have thought that had any design in it - was a mental car.

I know! That's the great thing about them - a loosely organised gathering of semi-orbiting parts that still functions as a collective whole called: a car. Beyond all reason it has been the most reliable car I've owned. One reg/rec, a set of wheel bearings, and a cam belt, plus regular servicing for the 11 years I've owned it. The carb ices up when it is REALLY cold though.

[speedpro]

I had a 125. It was one of the most fun cars to drive I've ever owned. Awesome specification considering the age. Japs took a long time to get there.

[chickenfunkstar]

In Wellington last weekend I had a choice of 91 or 98 and being the cheapskate I am I put 91 into the mighty Legnum(1800 GDI). It started OK at the gas station but just up the road after stopping for 10 minutes it didn't want to know. Finally got going and it ran fine till I got stopped going up the Mangaweka hill (115Kmh, 20 points, $80). Same starting problem. Same at Waiouru and in Auckland. It was only difficult to start when hot. I've topped it up with 96 and it's better but still partly a problem. The car ran fine, it just was/is harder to start.

Higher octane definitely made my turbo Cefiro run better and respond better to (lots of) throttle.

GDI engines do run particualrly high comp.
I think its about 12:1

[zadok]

I ran with high octane BP Ultimate 98 for a while, but I didn't find it gave any better performance. Supposed to be better for the environment, so I was doing it more for that reason. The price for fuel got so high I thought about the performance on my hip pocket instead. Some bikes might benefit from it, but my didn't.

Marty

[Hitcher]

American ST owners whack on about MON and RON all the time. Endlessly. They don't seem to "get" that other parts of the world have proper units of measurement...

[Keeper]

if you have a race license you can buy barrels of race fuel from Shell directly, works out about 96 at pump prices, but you have to buy about 200L at once

[250learna]

In Wellington last weekend I had a choice of 91 or 98 and being the cheapskate I am I put 91 into the mighty Legnum(1800 GDI). It started OK at the gas station but just up the road after stopping for 10 minutes it didn't want to know. Finally got going and it ran fine till I got stopped going up the Mangaweka hill (115Kmh, 20 points, $80). Same starting problem. Same at Waiouru and in Auckland. It was only difficult to start when hot. I've topped it up with 96 and it's better but still partly a problem. The car ran fine, it just was/is harder to start.

Higher octane definitely made my turbo Cefiro run better and respond better to (lots of) throttle.

your car is probably made for jap fule 100 octane. They are tolerant to as low as 95, but anything less and your risking demage to your engine.
Its ok to use high octane fule in cars that run on 91, but cars made for high octane should never be filled up with low octane fule

[Mooch]

Last time I gassed up:
91 - $1.23
96 - $1.28
98 - $1.33
all -ish. Depends where you go, but only varies by a cent or so. Rarely have I seen 96 and 98 at the same price tho (can't actually remember..)

I've seen a couple of places sell 'Race gas' which is 'off AvGas' so the guy at the desk told me. It's about 106 @ $1.95.. and wouldn't make much difference.. but smells God like. Was thinking about filling up with that, then pop to Repco/Warehouse and buy some Octane boost. try to get 110 rated fuel.. and watch it blow up..

Does avgas still have lead in it ?. Would be no good for the "cats" in modern bikes ?

[Flyingpony]

Legnum(1800 GDI).

GDI's require 96 or ideally 98 as Mits dealer told me.
Running on 91 will damage the engine.

[vifferman]

I had a 125. It was one of the most fun cars to drive I've ever owned. Awesome specification considering the age. Japs took a long time to get there.

I had a 132, which was one of the most fun vehicles I've owned, despite being in shitty condition and having had 13 owners. Engine was brilliant.
Current Fiat (Punto 90 ELX), bought for #1 son, is very comfy and easy to drive, but is BOOOOOORRRRRIINNNNG! And from the service records the previous owner gave us, very unreliable. It's '97, and it's had a new radiator, clutch, gearbox parts, the ECu crapped out, the disks and drums have been replaced, all sorts of electrical bits, etc etc etc.

[Lou Girardin]

American ST owners whack on about MON and RON all the time. Endlessly. They don't seem to "get" that other parts of the world have proper units of measurement...

Don't we use the same system, a blend of MON and RON to give our 91 and 96?
AFAICR, our 91 is equivalent to US 87.

[speedpro]

GDI's require 96 or ideally 98 as Mits dealer told me.
Running on 91 will damage the engine.

I'd been thrashing a bit till I put the 91 in it so wouldn't expect any carbon to have been left. I've got fresh shocks on the back and managed to fade all 4 and get the brakes vibrating and not on the ABS either, thankfully that cleared up.The motor didn't pink or otherwise misbehave with the 91. It just got hard to start when hot. After much commuting in Auckland I did put 91 in it once before and it pinked it's head off unless I was real careful. Funnily enough it didn't get hard to start that time. The plugs aren't that old either, maybe 6 months. It did essentially the same mileage - 40mpg or 7L/100km with either gas though I was going a lot slower generally with the 91 (and family) in the car.

My 'opinion' is that this Legnum and the Cefiro ran better over 120kmh. The Cefiro definitely got better economy. Even up to 160+ it was still (as) good (as it got).

[Pixie]

I know! That's the great thing about them - a loosely organised gathering of semi-orbiting parts that still functions as a collective whole called: a car. Beyond all reason it has been the most reliable car I've owned. One reg/rec, a set of wheel bearings, and a cam belt, plus regular servicing for the 11 years I've owned it. The carb ices up when it is REALLY cold though.

Just like Italia