thinking of getting a stinger gt

[MerlintheMad]

My Aug 2018 build MY2019 car is perfect no squeaks, rattles or any strange noises. My opinion of the squeaks and rattles are limited to small quality control issues on the production line and not something systemic to the vehicle.

Wholly agree.

2: The car is tuned for 91 RON fuel in Australia, using anything but 91 fuel without the engine being tuned specifically for a higher RON/Octane fuel is just wasting money on expensive fuel.

Is that equivalent to 87 Octane in the US? Because if it is, then your gasoline tuning is different from ours. The US manual (updated on page 1 | 2 by a sticker) specifically states that 91 Octane (or higher) is optimal. Unleaded gasoline with lower than 91 Octane is not recommended. Somewhere I saw that 87 Octane is the absolute bottom Octane. Around here our "regular" is 85 Octane; some filling stations have "mid grade" which is a mix of Regular and Premium and produces 87 Octane. I just get 91 at Costco.

 

[Legendsk]

Yes, 91 (RON) is roughly equal to 87 (R+M)/2. In the US all gas pumps are required to have printed on the pump, the octane using the (R+M)/2 method. So the US manual shown in my previous post specifically states 87 (R+M)/2 is the minimum. And indeed, for the first 1,000 miles I used 91 (R+M)/2 octane. When I realized 87 was acceptable and switched to 87 (R+M)/2 the mpg did not change at all - so running a higher octane than minimum didn't improve mileage at all, just as stated in the through detailed post someone made about 10 posts ago.

 

[dddd]

Wholly agree.

Is that equivalent to 87 Octane in the US? Because if it is, then your gasoline tuning is different from ours. The US manual (updated on page 1 | 2 by a sticker) specifically states that 91 Octane (or higher) is optimal. Unleaded gasoline with lower than 91 Octane is not recommended. Somewhere I saw that 87 Octane is the absolute bottom Octane. Around here our "regular" is 85 Octane; some filling stations have "mid grade" which is a mix of Regular and Premium and produces 87 Octane. I just get 91 at Costco.

I found that statement interesting, if the US manual has been updated with the sticker suggesting rather than 87 to use 91 (being USA I assuming PON)

I seem to remember watching a video where they dynoed the rear wheel drive and the all wheel drive stinger, the rear wheel drive put out 12 PSI boost but the all wheel drive put out 14 Pound of boost (presumably the additional boost is to cover the additional driveline loss and weight) I'm wondering whether in fact it's this extra 2 PSI boost that is now requiring the slightly higher octane.

Note that all wheel drive cars are only available in left-hand drive therefore affecting only some markets, in other words if in your country they sell the all wheel drive version it is quite likely your manual will suggest to use the higher octane, as they are not going to specify two different octane ratings for the one car and confuse people

Of course this is all just a theory

 

[ShannonC]

 

[dddd]

View attachment 27631

Yes that is what my AU hand book says as well, and that is what I will probably run in mine, but in AU we dont have the AWD version
MerlintheMad statement that his handbook had been up dated with a sticker regarding fuel octane rating had me curious and wondering why, I could be totally wrong (it would not be the first time)

 

[Manaz]

Wholly agree.

Is that equivalent to 87 Octane in the US? Because if it is, then your gasoline tuning is different from ours. The US manual (updated on page 1 | 2 by a sticker) specifically states that 91 Octane (or higher) is optimal. Unleaded gasoline with lower than 91 Octane is not recommended. Somewhere I saw that 87 Octane is the absolute bottom Octane. Around here our "regular" is 85 Octane; some filling stations have "mid grade" which is a mix of Regular and Premium and produces 87 Octane. I just get 91 at Costco.

It's not unusual for cars to be "detuned" in Australia when compared to Europe and Asia to put up with our lower RON fuels.

There are three ratings commonly in use for fuel "octane"

MON: Motor Octane Number.
PON: Average of MON and RON.
RON: Research Octane Number.

In Australia:

"Regular" unleaded - 91RON
E10: 94RON fuel. It's regular unleaded with 10% ethanol (which we get from sugar cane here, not corn like in the US)
"Premium" unleaded - 95RON
"Super Premium" unleaded - 98RON. Often a named product - Shell V-Power, BP Ultimate, etc.
100RON - rare (only one chain carries it that I'm aware) which is 98RON with ethanol added to it to get the octane up to about RON100.
E85 - 105RON. Requires a flex fuel sensor or dedicated tune. Generally a sensor is better, as although it gets called E85, it's anything from 70% to 85% ethanol, depending where you are and what time of year it is (as cars are harder to start in the cold on higher percentages of ethanol in the mix).

Our 95 RON is about the same as 91 PON in the US and Canada which is about the same as 87 MON (I don't know where).

 

[PxbVic]

Wholly agree.

Is that equivalent to 87 Octane in the US? Because if it is, then your gasoline tuning is different from ours. The US manual (updated on page 1 | 2 by a sticker) specifically states that 91 Octane (or higher) is optimal. Unleaded gasoline with lower than 91 Octane is not recommended. Somewhere I saw that 87 Octane is the absolute bottom Octane. Around here our "regular" is 85 Octane; some filling stations have "mid grade" which is a mix of Regular and Premium and produces 87 Octane. I just get 91 at Costco.

Sorry for the confusion however I did state I was talking specifically about the Australian Tuned car, which is tuned for 91RON Fuel which is identical to 87AKI (Anti Knock Index) fuel in the USA. So for all the USA guys 91RON=87AKI in the US or (R+M)/2.

This is about the easiest reference about Octane Rating to understand: Octane rating - Wikipedia

Why I put RON/Octane because they mean the exact same thing for those of us old enough to know have lived through the change in Australia from Octane to RON.

 

[Sindo]

Sorry to revive an old thread but I notice a lot of you Aussie have posted in this thread that you use 91 regular unleaded - my question is why not use E10? It’s cheaper and is 94 RON. Being a twin turbo I figure it can only be a good thing to run a little higher octane so I’ve been running E10 for the past 6 months and it seems to run perfectly fine (and feels about the same as the 98 RON I (stupidly) ran for the first 2 years of ownership before I realised regular is fine).

 

[Kato]

Sorry to revive an old thread but I notice a lot of you Aussie have posted in this thread that you use 91 regular unleaded - my question is why not use E10? It’s cheaper and is 94 RON. Being a twin turbo I figure it can only be a good thing to run a little higher octane so I’ve been running E10 for the past 6 months and it seems to run perfectly fine (and feels about the same as the 98 RON I (stupidly) ran for the first 2 years of ownership before I realised regular is fine).

Most of us have written off e10 since just about every car runs like crap on it. You are correct, but after 30 years of e10 causing issues people tend to just stick with pure petrol out of habit and a most servos have stopped selling it as a result.

 

[5tinger]

Sorry to revive an old thread but I notice a lot of you Aussie have posted in this thread that you use 91 regular unleaded - my question is why not use E10? It’s cheaper and is 94 RON. Being a twin turbo I figure it can only be a good thing to run a little higher octane so I’ve been running E10 for the past 6 months and it seems to run perfectly fine (and feels about the same as the 98 RON I (stupidly) ran for the first 2 years of ownership before I realised regular is fine).

E10 makes no sense. It's 2c less than regular but with 20% hit to MPG minimum and the other adverse effects of running ethanol such as increased moisture build up in tank and corrosion on metal parts.