VZ Exec Fuel Type..
So, at the moment 91 is in the tank, should I do a tank of 95/98 every so often to run it through the engine?
Or should I always use 95/98? (Not sure if it'll run on BP Ultimate etc..)?
No harm in putting 95 in ur car some/all the time. I use it for my accord/vs and ve ss. Don't know if it's worth going to 98 unless u have some serious mods tho.
Blues Brother # 1
Run at least 95 Mate. It actually costs less per 1L as you go further on 95 appose to 91, Much cleaner and better for your fuel injectors etc.
Many Tests have been done running E10, 91, 95 and 98. Turns out 98 may cost more at the pump, you go the furthest per 1L and works out cheaper in the end.
Ok, I'll switch to 95 when the tank is empty.
Will BP Ultimate be better to run in terms of the engine/fuel efficiently? Or should I just stick to 95?
Alloytec Racing
thats such a myth... i drove to victoria recently, thought to myself, petrol is free.. why not.. put 98 in the tank, on the way down... averaged 8.2L/100 (about 1700km of driving). used BP 91 and averaged 7.6L on the way home, go figure...
Life starts at 200km/h
Donating Member
So many things can make the consumption differ. Heat, tire pressure, wind resistance, weight, fuel load, slight incline or decline in the road, driving behind trucks, your driving style, braking and accelerating, idling, roadworks, air con, etc.Originally Posted by impulsive
P-plater
The GM rating for that engine is 95ron min. Also remember that bp 98 is around 3-5 cents more than 95, in comparison to the extra 15 cents that you pay for going to 95. In the end you pay less for 98. It's also better for the engine, for example the golf TSI had a minimum octane rating of 95, but some shallow people thought that it would run fine on 91, normally the knock sensors would retard the timing to prevent damage, but because the software in the computer was a bit average, it would ping. Now if everyone ran at least 95 or 98, hundreds of engines wouldn't have destroyed themselves.
Impulsive, All new cars have knock sensors that detect when a car pings, The higher the octane rating the more the timing can advance without pinging, most of the time. It's not a myth. Fuel saving - a professional engineer's view
Originally Posted by Little Red VZ Go-Kart
1. Why would you want to floor it, or move it to the red line? Especially with the lack of airbags and ABS features!? What do you hope to achieve by that??Originally Posted by HoldenV8
give everything a spray with wd40 wheels brakes that should fix the squeaks
I've got a Calais but had similar experiences on trips to Brisvegas from Sydney. With 95RON I was getting 8.5L/100km but it felt a little more lively. With 91RON it usually sits at 7.8L/100km on the same trip. Best I ever got was 7.2L/100km with my young bloke on his 'L' plates going to Wagga & back in a day ..... but how boring was that @ 80km/h!
Ok, so there is no harm in running the car on BP Ultimate? Just making sure as I know some cars don't play nice with 98.
An interesting read in that article,backs up my own testing between e10,91 and 98. Using 98 did give me better economy (0.4L/100km). Over a 500km tank cycle i use 8 litres less than standard 91. On a L76 auto that does 14.0l/100km i gain a extra 87.5km per tank. Works out on 91 i pay 18.76 cents per km driven on 98 i pay 21.17 cents per km driven(correct me if wrong as it gets complicated and my maths is not great). Even though i get more km per tank it still works out to pay less for 91 and fill up more often, than to pay for 98 and fill up 87km later.
So a 5% saving is about right from the article. 98 would suit a very long freeway cruise as the extra economy combination of cruise control set at constant speed and 98 fuel would prob get you to your destination without stopping.
98 also suits chasing big power numbers
Last edited by Phillshz; 04-10-2011 at 04:50 PM.
P-plater
There has been many lab quality driving tests with different fuel. 98ron has been undoubtly proven to be cheaper per km on modern cars.
Originally Posted by Little Red VZ Go-Kart
1. Why would you want to floor it, or move it to the red line? Especially with the lack of airbags and ABS features!? What do you hope to achieve by that??Originally Posted by HoldenV8
give everything a spray with wd40 wheels brakes that should fix the squeaks
I did see a test on today tonight not long ago that agrees with your comment,but then after watching that i decided to do a google to double check it as i`m always sceptical about those shows (they seem to be just glorified advertisments or picking on the dodgy trade/business of the week) and found a NRMA article about the same thing,it was back in 1996 though and it basically said what i found out during my own testing and said to stick to standard unless your motor requires it. So go figure. I can`t find it now but this is a close cousin to it Filling up? Don't pay for premium - www.drive.com.au
Donating Member
15 years is a long time in engine and fuel development.
F O R U M W A R R I O R
98 wont hurt a standard engine and its supposed to have cleaners in it so thats a plus. Performance wont come into it unless the car is tuned for 98 ron to take advantage of the higher octane. As for consumption the only real way is to run a few tanks of one and note the figures then run a few tanks of the other and compare.
Silver Certified.
Very true. Engines and management for sure. Standard 91,95,98 fuel prob not much,shell was mucking around with their fuels adding things to them though.
All cars are different. Some I've had run no differently on 91 from a dodgey independent station to 98 from Mobil or BP. Then one VR I had got amazing economy out of Mobil 95 octane. But if I tried 98 octane or 95 from a different station the economy dropped off.
My current car needs mobil or BP 98 all the time or it runs crap. Even shell high octane runs like balls. I think every car is different so find out what works best for your beast and stick with it
Your freedom ends where mine begins
For non-performanc engines it's good to run a tank or two of premium every once in a while because premium cleans the engine.
Probably wouldn't bother with a 98RON though,a bit overkill for your application.
Just run some 95RON through one once in a while and your engine will be that little bit cleaner.
The power of 253
For the past 2 years or more, Ive ran my VZ Alloytec on 98octane. For the past 2 months Ive avg 9.7L to 9.8L per 100km weekely, driving every where. Its rare to see my avg go past anymore then 10.4L per 100km. When ever i try 95 octane, my car seams to smell warm and avg drops of a little bit.
When you fall off the pace with the car you brought to the race, I'll be the one who's flying by you kickin' sh#t in your face
i only ever run 95 in my ute an its about 11L/100kms
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