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Spaceboy
Occasional Poster

Location:
Brisbane
Registered:
September 2002

Whats the difference???	Sun, 13 April 2003 12:45

OK I dont really know that much about oils (petrol)? but whats the difference. I own a Supra. My dad says regular unleaded is fine, and when I took my car for a test drive, it was almost out of petrol so they (the importers, the cheap bastards they are) filled it up with a little bit of regular unleaded as well. But since I've got it I've switch and just filled it with the 95 octane (i think thats what it said) or premium. I havent driven it that much yet so I've only filled it up once. While one of my friends who own a WRX says he wont fill his car up unless its with something Optimax??? (sorry forgot whats it called) Whats the difference with the petrol and is it different for different ptrol station and am I doing the right thing, filling up with premium stuff? Sorry if this sounds like a stupid question. Thats why I'm asking. [Updated on: Sun, 13 April 2003 12:46] [Report message to a moderator]

Soarin
Regular

Location:
Sydney
Registered:
June 2002

Re: Whats the difference???	Sun, 13 April 2003 14:59

My two cars run on one of the following (depending what's available... all are 98RON): - BP Ultimate: Good fuel, get better economy, and is cheaper than Optimax - Shell Optimax/Mobil 8000: Good fuel, a bit better fuel economy than on reg. unleaded, but sometimes bloody expensive - Caltex Vertex Gold: Good as well, between the prices of BP Ultimate and Shell Optimax/Mobil 8000 BTW I've got a 1993 Soarer 2.5GT and a 1999 Tarago in the driveway, and both get treated to 98RON fuel [Report message to a moderator]

Location:
Sydney
Registered:
November 2002

Re: Whats the difference???	Sun, 13 April 2003 17:24

Caltex Vortex Gold is only 95 RON http://www.caltex.com.au/corporate_com_env6a.asp [Report message to a moderator]

Norbie
Forums Junkie

Location:
Brisbane
Registered:
May 2002

Re: Whats the difference???	Sun, 13 April 2003 23:49

A Supra will be happier on high-octane fuel. Regular unleaded is 91 RON while premium unleaded is at least 95 RON (the minimum octane levels are set by the government). Some fuels are 98 RON, eg Shell Optimax and BP Ultimate 98. Note that 100 RON fuel is available in Japan, so most of their high-performance cars (eg Supras) are tuned to run on that. So to answer your question, always run the highest octane fuel you can find! The car will run smoother, fuel economy will improve, and it will perform better also. [Report message to a moderator]

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