Petrol for V6

® Andy · Mar 14, 2005

So I ran the 172 on Optimax. V6 book says 95 or 98 RON, but 98 "preferred". What are the rest of you running on?

telford_mike · Mar 14, 2005

V6 book says whaaaaat? Mine says 97! I usually stick any old supermarket rubbish in mine unless its a special occasion.

rory182 · Mar 14, 2005

Quote: Originally posted by telford_mike on 14 March 2005

V6 book says whaaaaat? Mine says 97! I usually stick any old supermarket rubbish in mine unless its a special occasion.

good on you, Im a religious 95RON user in my 182, frowned upon by many.

BRUN · Mar 15, 2005

if you can afford a V6 you can afford to put proper petrol in it, run it on Optimax

TheCake · Mar 15, 2005

95 or Sainsburys 97 in my Cup. 51,000 miles on still going strong... the day it needs race fuel I might consider upgrading to 98RON....

scotty1 · Mar 15, 2005

Optimax everytime.

Dash · Mar 15, 2005

Mine V6 book says 95 or 98 RON,(1)

(1) it is preferable to use 98

telford_mike · Mar 15, 2005

actually Ive just read the book and Andys right, 95 or 98 (pref).

74.5p for 95 or 89.9p for 98?

BRUN · Mar 15, 2005

i pay 84.9 for Optimax

telford_mike · Mar 15, 2005

^^ in my dreams

Chili Red · Mar 15, 2005

Oooh get you asking all the V6 questions now, well be paying to talk to you soon

telford_mike · Mar 15, 2005

^^ hehe no hell be too busy paying the petrol station

Simo · Mar 15, 2005

Optimax all the time. 84.9p

TheRoninV6 · Mar 15, 2005

i dont notice any difference between 95 and 98 in the V6, all though i noticed a tiny improvement in 98 ron on the 172.

v6Max · Mar 15, 2005

I used to use Optimax and then I brought a data-logger to use on track-days. I can find absolutely no difference between Optimax, Sainsburys 97 or BP 95 to be honest in terms of performance. So the claim that Optimax is "performance enhancing" doesnt seem to hold true for my specific experience.

I get slightly better fuel economy with the Sainsburys stuff - but we are only talking about small amounts.

Optimax degrades as well - it leaves the refinery as 98 but the octane rating can and does reduce during storage.

The only thing that does seem to be true (according to the Evo tests) is its cleanliness.

iwantaV6 · Mar 15, 2005

well whatever you put in, it will only give you 250 miles max to a full tank, unless you cruise the motorway all day at 60mph.

andy_leitch · Mar 15, 2005

Petrol shouldnt really degrade. Theres nothing in the mixture fore the hydrocarbons to react with. The only possibility i could think of is if small hydrocarbons (not good to burn anyway) join physically, not chemically to make larger hydrocrabons which actually give more enegergy when burnt.

98RON at the refinery should mean 98RON at the pump.

specialK · Mar 15, 2005

use Optimax where available, otherwise other "premium" grades (which are generally 97 RON rather than 98 of Optimax) - need to go to Germany and fill up on their 100 RON rocket fuel though !!!

® Andy · Mar 15, 2005

Right ... I didnt buy the V6 to be miserly about petrol so Optimax it is.

Currently running on Sainsburys SUL since, despite the computer saying I had 60 miles to go, the fuel gauge was reading empty when I got it home yesterday.

Which leads to the next question ... what are the dynamics of the fuel gauge on the V6? Linear? Stays high for ever and then plummets like a stone? When it hits the bottom you can drive for 1 mile ... 20 miles?

SimonV6 · Mar 15, 2005

Quote: Originally posted by Simo on 15 March 2005

Optimax all the time. 84.9p

Same here, its the same price too, 95 is 78.9p so difference is not that much.

Simon.

SimonV6 · Mar 15, 2005

Quote: Originally posted by specialK on 15 March 2005

use Optimax where available, otherwise other "premium" grades (which are generally 97 RON rather than 98 of Optimax) - need to go to Germany and fill up on their 100 RON rocket fuel though !!!

Kathy can you take a tanker with you and bring us all some back please?

Simon.

specialK · Mar 15, 2005

Andy - fuel guage - yes, stays reasonably sensible down to about 1/4 - then hits the bottom like a stone!!!

light comes on at about 40 (ish) and I have driven probably at least 20 once the light is on, but only in emergency - wouldnt like to say you definitely could !!!

Simon - hmmmm - I sense a business opportunity here ....

steveV6 · Mar 15, 2005

Went over 30 miles in the Mk1 vee with the fuel light on. Never had a chance in the Mk2 as I terminated its life too early!!

clarkiev6 · Mar 15, 2005

optimax + millers octane booster... bout £ 4.50 per bottle does 2 tank fulls.

noticeable difference in power and better fuel consumption... pays for itself..

Bailey · Mar 15, 2005

I ONLY run on Optimax!

Mike T · Mar 15, 2005

The standard ecu is mapped to run on slurry so I wouldnt worry to much!!!

Optimax and others make a slighlty bigger bang but will only really increase power with some ignition advance to take advantage.

Get a chip, go Optimax - otherwise buy more beer!

miketheman2k · Mar 15, 2005

Quote: Originally posted by Mike T on 15 March 2005

otherwise buy more beer!

But thats even more expensive than optimax!

clarkiev6 · Mar 15, 2005

Quote: Originally posted by Mike T on 15 March 2005

The standard ecu is mapped to run on slurry so I wouldnt worry to much!!!

Optimax and others make a slighlty bigger bang but will only really increase power with some ignition advance to take advantage.

Get a chip, go Optimax - otherwise buy more beer!

very true mike...lol mine is chipped!!

vee6 · Mar 15, 2005

Quote: Originally posted by clarkiev6 on 15 March 2005

Quote: Originally posted by Mike T on 15 March 2005

The standard ecu is mapped to run on slurry so I wouldnt worry to much!!!

Optimax and others make a slighlty bigger bang but will only really increase power with some ignition advance to take advantage.

Get a chip, go Optimax - otherwise buy more beer!

very true mike...lol mine is chipped!!

Click to expand...

was it worth spending like 500 quid for 4-6 bhp ?? then paying through the nose to run it on suff thatll make maybe 0.5% difference ?

clarkiev6 · Mar 15, 2005

i gained 12 hp for £250 +vat.... i think it was abit pricey yes..

i like the better mid range torque i gained the most..

[Edited by clarkiev6 on 15 March 2005 at 11:06pm]

vee6 · Mar 15, 2005

Quote: Originally posted by clarkiev6 on 15 March 2005

i gained 12 hp for £250 +vat.... i think it was abit pricey yes..

i like the better mid range torque i gained the most..

[Edited by clarkiev6 on 15 March 2005 at 11:06pm]

did it up the limiter ? seems as if there is a lot more at 7k but ECU is already cutting back fuel at that point .. sorry for the hijack

clarkiev6 · Mar 15, 2005

thats ok mate... the most gain was at 6750 rpm... noticeable on the graph print out..

fully synthetic oil helped as well less friction . it was smoother at 7500 rpm.

miketheman2k · Mar 15, 2005

Quote: Originally posted by clarkiev6 on 15 March 2005

fully synthetic oil helped as well less friction . it was smoother at 7500 rpm.

I thought the limiter was set to 7150 though?

Where did you get it chipped? Would you notice a big difference if you went back to standard, do you have any mods?

clarkiev6 · Mar 15, 2005

chipped in plymouth... limiter on mine is at 7750... dont know if that is renaults doing or the superchip...

Pinhead · Mar 15, 2005

Quote: Originally posted by Andy D on 15 March 2005

Which leads to the next question ... what are the dynamics of the fuel gauge on the V6? Linear? Stays high for ever and then plummets like a stone? When it hits the bottom you can drive for 1 mile ... 20 miles?

As soon as i have left the petrol station the gauge starts going down, after 70 miles it is halfway. Get 280 miles out of a tank though

[Edited by Pinhead on 15 March 2005 at 11:20pm]

clarkiev6 · Mar 15, 2005

its not the guage mate .. its the shape of the tank......

vee6 · Mar 15, 2005

Quote: Originally posted by Pinhead on 15 March 2005

Quote: Originally posted by Andy D on 15 March 2005

Which leads to the next question ... what are the dynamics of the fuel gauge on the V6? Linear? Stays high for ever and then plummets like a stone? When it hits the bottom you can drive for 1 mile ... 20 miles?

Click to expand...

when the needle hits zero .. there is still a comfortable 70 miles left in it .. but when the yellow light comes on ..make a bee line for some fuel .. reckon mine has got about 5 miles MAX when orange is on !!

clarkiev6 · Mar 15, 2005

orange light.... 15 miles for me....

telford_mike · Mar 16, 2005

beware of the computer - if it drops below 25 miles remaining youre going to run out....

® Andy · Mar 16, 2005

The last bit really does drop like a stone

Reckon I used the last sixth of the tank driving the 15 miles from Metallic Blacks ... was flatlined by the time I got home. However, no light on yet and computer is still saying 70 miles. Its about 10 miles until I can get to the Shell garage to fill up to the brim with Optimax.

Petrol for V6

v6Max

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