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Dylan O'Connor
Tinkerer
QLD
V8 SC400 4.0GT-L

Posts: 10
Reg: 08-2008

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Thursday, December 18, 2008 - 12:31 am, by:  Dylan O'Connor (Twiqurky) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Having never owned a V8 or driven one constantly, one quick question.

Why is it better to run Premium fuel in a V8 then 91RON fuel? I know the octane rating is higher but why does everyone tell me to use Premium in a V8?

I have had Falcon I6 and Audi V6 before and no one said anything.
Peter Nitschke
Junk Filterer
South Australia
UZZ30 UZZ31

Posts: 10325
Reg: 11-2004

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Thursday, December 18, 2008 - 01:05 am, by:  Peter Nitschke (Pen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

They were designed to run in Japan on 100 RON, so 98 RON is as close as we can get here.

Better power and efficiency tends to be a good trade off for a couple of extra cents per litre. :-)
Steve Zac
Tinkerer
vic
v8

Posts: 48
Reg: 09-2008

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Thursday, December 18, 2008 - 07:07 am, by:  Steve Zac (Tnt992) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

All newer cars have knock sensor. If you put low octane or even plus ulp which is 10% ethanol you car will sense that and back off the timing so it doesn't ping. This means any fuel will do no damage but efficiency is a different thing all together.
Old school cars would just ping.
Phil Bonning
TryHard
nsw
gt limited

Posts: 123
Reg: 03-2007

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Thursday, December 18, 2008 - 04:00 pm, by:  Phil Bonning (Bonbon) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

At the V8 supercar weekends they have 2 cars set up to run fuel in seperate banks.In a holden and ford and both are set up the same, 4 cylinders run on unleaded BP fuel and the other 4 cylinders run on BP ultimate fuel. It has cameras set up inside to show how it runs and it shows the high octane burns alot cleaner. In hind sight that will give less carbon and keep oil cleaner and reduce wear on your engine. I have use it for years and find i have gain about 30 kms extra per 60 litre tank and never had a injector problem. Car doesnt ping on it either. Try it for ya self and see how your car goes on it. Shell high octane is good but I like BP better.
Dylan O'Connor
Tinkerer
QLD
V8 SC400 4.0GT-L

Posts: 13
Reg: 08-2008

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Friday, December 19, 2008 - 02:04 am, by:  Dylan O'Connor (Twiqurky) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Well now that its cheap enough I intend on using the shell V-Power stuff.

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