Jump to content
SAU Community

Recommended Posts

That was a great read.....

Was waiting for someone to do a proper test....

Didnt have my mone on caltex tho.... I assumed Optimax was a touch better....

My own tests....

Caltex 98 - Car pinged its tits off (thought i must have got regular unleaded)

BP Ultimate - Car ran great 270km per tank (air fuel ratios were good)

Shell 98 Optimax - Car ran a little rough 300km per tank (air fuel ratios were bordering un safe)

So i generally use Ultimate or Optimax. I find when using Ultimate my bumper is heaps dirtier after a tank and believe this is due to Optimax being a little cleaner.... Also i drive my car the same all the time.... Average fuel consumption is the same every time.... 300 per optimax and 270 from ultimate.... Plus i can get 4cents off at shell.... So i try to get shell as often as possible... However im empty today so im gonna fill on Caltex 98 and try again.... Maby i just got a bum batch the first time????

Could be a bad batch, when Vortex98 first came out we had a car towed into work with half a tank of water after filling up on it.

  • Replies 62
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Posted Images

I guess this shows that fuel from differing companies do vary. The government says what the RON should be and there is a plus or minus fiddle factor. Also winter fuel has a higher RVP or DYPE to make your car easier to start. Of course in summer this is reduced so you don't have problems on hot days.Though govt regs are lowering these to cut back on the smog levels.

As you can see in the states of Australia the fuel will differ because of which refinery made it.

The other thing to remember that denser fuels tend to make you car run a bit richer.

The higher the RON or MON the higher it's resistance to knocking. Hi octane fuel in a car that doesn't have the sensors that our skylines have[ knock sensors, etc] will have no increase in performance .

I guess the water problem is one of those things that happens. service station tanks get condensation in them,etc.I won't use Mobil 1 oil because i bought a 5 litre container from Big w a few years ago and luckily I notice it had a lot of water in it. I rang the Mobil help line . They couldn't explain it.

I allways found that vortex 98 pinged my skyline very hard but as soon as i put Ulimate in it the pinging went away and the car went harder. I also found that Synergy 8000 SOMETIMES would make my car go noticably harder.

weid that Vortex came out on front - i have tried it many times and got the same result every time.

I wonder how much free fuel or how much money Caltex paid MRT ? =)

Interesting that for what seems to be a fairly thorough test (to the extent of getting some folks

with a van from Caltex to analyse the fuels) they didn't:

a) adjust mixtures so that they were exactly the same for all fuels. Given that Optimax

claims to be a denser fuel, I'd have thought this was important.

B) adjust timing to take maximum advantage of all fuels (timing _was_ adjusted, but not for

individual fuels).

If we accept that the results are a) accurate and B) relevant given the sampling procedure

(and there have been some arguments to the contrary earlier in the thread) then the

test shows that Vortex98 is the best bet for 'good power' on an untuned Ecutek in a Subaru.

I don't know that it follows that Vortex98 is necessarily 'the fuel' to use on a tuned car.

My belief is that 'the fuel' to use on a tuned car is the fuel it was tuned on, batch variations

aside.

I'd love to see a comparison where the same car was adjusted for the same

mixtures across a range of fuels, and the adjustments needed shown.

Then I'd like to see the mixture-corrected car adjusted for timing (with the adjustments

tabulated) and see power measured.

Then I'd like to see the tests repeated, monthly, for 12 months.

I'm dreaming :(;)

Regards,

Saliya

something else you might be interested to know

from the Federal Chamber of Automotive Industries website

http://www.fcai.com.au/ethanol.php/2004/03/00000001.html

"Nissan vehicles manufactured from 1 January 2004 onwards are capable of operation on ethanol-blended fuels up to E10 (10% ethanol), providing that blending of the ethanol component to the petroleum component of the fuel has been properly made at the fuel refinery (ie there is no "splash-blending" of the fuel).

For Nissan vehicles manufactured prior to 1 January 2004, Nissan Australia does not recommend the use of E10 because of drivability concerns and/or material compatibility issues."

regards

Jase

im still not clear about whether Ethanol is good for the car.

i remember they put it in a lot of petrols and damages engines.

theres new 'cheaper' petrol with ethanol (<10%) 98 otcane..

i just want to know, is this stuff any good??? or should i stay away.

if i could afford ultimate, i woudnt ask these questions...

The main concern with Ethanol is it's a solvent and can eat some types of fuel lines, but mate you drive a performance car, one that was designed to have a diet of Japanese super (100RON), tighten your belt and buy 98RON, buying lower octane fuel will only cost you a LOT more if you do engine damage because of it.

Siliya has hit the nail on the head. What happens when you lean out your mixtures? You get more power. All these fuels test to be similar RON, so advance sould be similar. The results that we are seeing is how close to the fuel that the ECU was tuned with, (which was vortex).

Overall I think the quality of the report is pretty poor. It looks to me like it's a draft that hasn't yet been scrutinised by the academics that should have been overseeing the testing.

eg

But why were they better? After consulta

Winter mix March 16th to November 14th maximum legislated amount is 90Kpa @40 deg C ?????????????????????

PAUL CHECK HERE.

Please refer Appendices and chart XXXX before reading this part!

If I was UNSW i'd be dissapointed that something like this was released. If I was MRT and they were asked to pay for this I'd be suitably unimpressed as well.

I'd even go further than what Siliya suggests and include ADR drive cycle testing.

Overall I think the quality of the report is pretty poor. It looks to me like it's a draft that hasn't yet been scrutinised by the academics that should have been overseeing the testing.

eg

If I was UNSW i'd be dissapointed that something like this was released. If I was MRT and they were asked to pay for this I'd be suitably unimpressed as well.

I'd even go further than what Siliya suggests and include ADR drive cycle testing.

If you go through the OCAU thread, u can see that this reports is actually an unfinished draft that was leaked.

I've heard some dyno operators in SA are recommending the ethanol blends for maximum power, but cars must be tuned to suit the fuel. Don't know how accurate these rumours are, so treat them with a grain of salt.

I don't think I'm game to try anything else unless I know for sure it won't affect longevity in my car. Ultimate is consistent for me, the cleanest of the lot, and I have enough power as it is at the moment :)

I wonder where SA gets its fuel from and which would be the most "fresh" fuel. Anybody know?

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • Seat of the pants assessment of the new intake: The car is way less "doughy" when hitting the loud pedal, especially off idle when stopped or in traffic, I did use a cheapo lazer thermal thingo to measure the temp around where the pod filter got its air, it was between 55 - 60°C, in saying this the car was shut off and not moving, so the OEM intake pipe was not supplying any fresh air to where the pod was when the car was at least moving A weird bonus was induction noise on the throttle in the cabin increased a bit,  I was worried that I was actually going to lose some of that induction noise I love so much, outside though, when I got the daughter to do a WOT drive by pass for me, the induction noise has increased alot when on the throttle, not quite ITB doort, but well up there I'm extremely happy with the results and have been exploring the country roads in the region  As for house mods: 1.New front fence is up and is awesome, it really upgraded how the joint looks from the street, and the added security is nice 2. Electricians have replace some interior lights, and with more lighting in the garage, a few new motion detecting lights out the front above the garage, front room, and at the front door, which I have already found heaps helpful coming and going, also now has fancy pants CCTV all round the house The only hold point for power though is the solar and batteries due to supply issues, although this will happen over the next few weeks 3. I have done a heap of landscaping out the front and I'm almost ready to do a new small retaining wall with some nice blocks to replace the brick and cemented in rocks around the raised garden beds cemented in river stone "was the fashion at the time" the house was built. I currently have a pallet of retaining wall blocks and 2 bulka bags of 20mm blue metal to replace the wood chip that is in the raised garden beds around the house 4. I now have 3 big raised garden beds for out the back to grow some vegetables, about 70cm high, 200cm long and 100cm wide 5. My 2 compost bins are already pretty full with brown, green and kitchen waste from the landscaping I'vedone so far, but they will probably take a few months to break down, so anything else that gets chopped, trimmed, and kitchen waste will just start filling the base of the raised garden beds to about 30cm before I start throwing 40cm of good compost, and stuff, for the vegetables to grow in, I'll need a few ton of compost and soil, but the local supplier can sent me bulka bags of the stuff Basically the logs, wood chips and a few strategically placed rocks for drainage, will give the beds some good organic materials down low to break down over time, and they will hold moisture during the warmer months to save the water in my big arse water tank if we don't get alot of rain So, all in all, the car and house mods are going well, and I'm really enjoying being retired, I sleep in too 0700 and slowly plod around inside until I feel like actually doing anything, and only work in the yard for as long as want, which has actually been alot over the last few weeks,  although when you look at it, it seems that not a huge amount of work has been done,  until I look at the before I started the work pics Happy days and good times indeed 
    • hahaha yeah. Plan is to get side skirts and probably just rear pods. But going to do them one-by-one. I've got a set that I really like from RHDJapen, but that one isn't shipped to AU. So need to find someone who can get it for me
    • Here's an idea, answer the questions I asked you as they are trying to work out WHY the LSD will be binding up in a straight line.
    • You haven't driven many modern cars then have you? Most of them have sfa steering feel with their stupid electric bullshit steering systems.
×
×
  • Create New...