What octane do you put in your tank?

  • Thread starter Thread starter riivaaja
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Scaff how many examples of text issues do you want me to point in this thread? And i didnt see any of you pay attention to it! You must have sent a private messege... i see now!

I think i was misled Mafia boy... and i payed a stupid ammont of 150 euros for the 25 liter drum ( and i bought two) ... :scared:! Expensive import rate and of corse the guy that imports it keeps a few coins for him self:)!
 
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horde_r35
I think i was misled Mafia boy... and i payed a stupid ammont of 150 euros for the 25 liter drum... :scared:!
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Nah, you're not misled....it is 109RON. I think that they are using the knock index and calling them it's octane ratings on the first chart I showed. It's technically correct because it's RON+MON/2....so in your case, 109+99 / 2 = 208/2 = 104. :cool:

Have you checked out Elf Racing fuels however?? They would be a lot cheaper in your neck of the woods. Plus you have a local distributor there in CESPA.

*added bit* I'd listen to Scaff if I was you horde. ;) He's one of the more friendly mods on here and if you have his hackles up and ready to go MMA on your butt then your best solution would be to just shhh and let it slide. :cool:👍

Not saying that Famine (or any other mod) isn't friendly, he will just make your head explode from cramming so much information into your brain, removing any need for banning because your brain has been turned to mush and you lost all ability to use a PC ever again. :p
 
mafia_boy
Nah, you're not misled....it is 109RON. I think that they are using the knock index and calling them it's octane ratings on the first chart I showed. It's technically correct because it's RON+MON/2....so in your case, 109+99 / 2 = 208/2 = 104. :cool:
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American Octane = Anti-Knock Index = Pump Octane Number = (RON+MON)/2. So in the US it'd be 104 octane.

European Octane = Research Octane Number. So in Europe - where horde and I both reside - it'd be 109 octane.
 
For my 1.8 MX-5 NB this is what I've found so far. I don't know the RON figures.

BP Ultimate - 33.77 MPG (only 1 tank)
Sainsburys Super - 32.49 MPG (6 Tank Average)
Shell V-Power - 32.38 MPG (8 Tank Average)
Shell Regular - 30.97 MPG (3 Tank average)
Tesco Super - 32.22 MPG (4 Tank Average)

I think the BP and Sainsburys super are the same being as a BP tanker was filling the Sainsburys tank up one time when I was filling up. I'm going to try the BP a few more times to get a better idea of average economy, but tbh there is always a long queue there and I'd rather just go to the shell garage near my work as there is less waiting.

Also the Tescos super made the car feel sluggish each time I put it in and the economy was not consistent at all, 3 tanks were 30-31-ish mpg and then I had a freak one where I got 34+ mpg. *shrug*
 
Maffski
For my 1.8 MX-5 NB this is what I've found so far. I don't know the RON figures.

BP Ultimate - 97RON
Sainsburys Super - 97RON
Shell V-Power - 98RON
Shell Regular - 95RON
Tesco Super - 99RON
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Considering that all UK fuel is essentially the same stuff but with different additives according to the brand, the differences can be stunning. Over a year I ran my MX-3 on Tesco regular I noticed that the economy fell off quite sharply. I stopped going and shifted to the not-quite-so-local BP and it came back gradually over 6 months. When I calculated the figures later, the difference was more than 20% - 28mpg from Tesco and 34mpg from BP, for the same journeys.
 
My dad used to put jet fuel in his bonneville when he worked at the
airport. Old diesels ftw.
 
Famine
Considering that all UK fuel is essentially the same stuff but with different additives according to the brand, the differences can be stunning. Over a year I ran my MX-3 on Tesco regular I noticed that the economy fell off quite sharply. I stopped going and shifted to the not-quite-so-local BP and it came back gradually over 6 months. When I calculated the figures later, the difference was more than 20% - 28mpg from Tesco and 34mpg from BP, for the same journeys.
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Cheers for supplying the RON figures, much appreciated. 👍

Very interesting regarding the Tescos/MX-3 situation, bet you saved a packet after you changed.:)
 
Diesel:grumpy:

Avensis company car and it's the strongest engine they put in it. I have to use the wife's punto to get a petrol fix as my bike's off the road.
 
Thatman
You know I just took a second look at the poll....Does any Manufacturer require 89 octane? Seems like nobody uses it....
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Subaru's 2.5i models suggest 89.

I use 87 since its a lease (And due up in a month) and I haven't noticed any difference.
 
I'm pretty sure the S'Line runs 91 RON. I just usually make a beeline for the unleaded pump at any petrol station that I happen to have a discount voucher for which is usually Woolworths (Caltex, Everyday Rewards Card ftw) or Shell.
 
Wow ... I never thought I would one day see Sá Pinto's picture in gtplanet :lol:

This is a tuners discussion, I see. I'm the ordinary guy that has a nice bike (XJR 1300) and a nice car (old BMW 325i) and always uses 95 RON (the EU one) fuel on both, with no problems.

Apart from those, I have an Espace to travel with the family, but that one uses Diesel.

um ... and next month I'll travel to Great Malvern, England to get my Morgan +4 ... not sure what I'm supposed to use on that one. Any other Morgan owner in gtplanet?
 
Hun200kmh
um ... and next month I'll travel to Great Malvern, England to get my Morgan +4 ... not sure what I'm supposed to use on that one. Any other Morgan owner in gtplanet?
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Knowing Morgans, probably coal.

That option aside, it uses a Rover K-series engine, from memory. So it'll run just fine on 95RON. As above, it'll be able to use 98RON but you're not likely to see any difference save a slight fuel economy gain.
 
2005 Subaru Impreza - 87 Octane
2000 Saturn - 87 Octane
1969 Camaro - 93 Octane.
1967 Mustang - 87 Octane
 
Famine
Knowing Morgans, probably coal.
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I will forgive you that :lol:

Anyway, nowadays I think it's a 2.0 L Ford engine, as are the 4/4 (1.6 L) and the Roadster (3.0 L). Specs as follows, taken from the Morgan website:


Engine - 1999cc 4 cylinder

Max Power - 106 Kw (145 bhp) @ 6000 rpm

Max Torque - 187 Nm (140 lb/ft)

Performance - 0-62 mph 7.5 seconds

Top Speed - 118 mph (189 kph)

Dry Weight - 877 kg

Power to Weight - 165 bhp/tonne
 
That's pretty much a mid-range Focus engine. 95RON will do the job - though consult your manual for more detailed information :D
 
Famine
If you want some photos taken on the day, give me a shout.
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That's very kind of you, thanks, if you live near Malvern I will surely try to meet you :)

(although it's better if you keep your camera safe, I'm afraid the big cloud of coal dust surrounding the factory might damage it :D )
 
If you put 85% ethanol to 15% gasoline, you get E85.
 
How much of a power gain do you think would be there to be had tuning for 98 rather than 95 octane? Australian measurements.
 
Depends. High compression or boosted motors will post more gain from being tuned for high octane obviously as they need the detonation resistance more.

Given that as far as I know you're on an internally stock 3800 however, tuning for 98 isn't going to do you much good and will just cost you more at the pump.
 
The heads were machined and it should be a 10.0:1 compression ratio or there-abouts.

I probably wouldn't worry much if it was only 1 or 2 kw, but 5kw would be a darn sight of a gain.
 
Big burly 4300 = 87 octane. If I'm near home I get it from Sunoco or Mobil, depending on what errand I'm running; but if I'm coming or going to school (which is usually what I'm doing when I fill it up) I get from an Indian Reservation. This engine will run on anything, so I do it more out of habit and cost than anything else.
 
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When I fill up with 98, my cars performs better torque wise than when I fill up with 95. It's not psychological/between my ears.

Would I gain more torque when I use a little ethanol?
More important; should I destroy the engine by mixing a small amount of ethanol with gasoline?
 

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