for the south east suburbs - mornington peninsula areas this place has it
 
841 Nepean Highway mornington caltex
its the one near mornington autobarn
 
MRTURBO - Mabelle put me onto it, it was on my list of places to go but now its confirmed.
cheers mate

with the whole thing about the ecu constantly advancing and retarding timing in response to knock, wouldn't running e85 in a car tuned for 95 still run more timing due to the higher knock rating?
 
also how much e85 would be needed to add to 91oct to achieve the same oct rating as 80/20 98/e85?
 
another thing, all the stuff about needing e85 compatible lines etc what about the fuel level sender? how would that be affected as that's something you can't change

Not if it was running a fully useable ign advance curve on 95 (or 98). The ECU will only apply the ign advance levels programmed into the existing ign map.
 
According to my calculations 80/20 is approx ~104 RON. So if the estimate on 95 above is accurate, then 91 would require approx 30% to make 100 RON.
 
From what I know, some fuel senders have been reported as sending erronious fuel levels on E85, but this seems to be a particular type of sender, and may be from the increased conductivity of the fuel, as much as the fuel itself.

copy and paste from email i got from caltex
Hi Steve

Sounds fine to me - there's no issue with blending the two products as long as the car has ethanol compatible components and the engine is tuned for it. If you've already got the advice that it works well then it's worth a shot in my opinion.

The blend will easily get you to 100 RON (our tests on E-Flex have consistently clocked up 105 RON). Sound fun!
I'm happy to share what I know and hope that will get you asking the right questions to the guys who service your car. I've attached a PDF of the recommended modifications to a vehicle by ANFAVEA (who are the National Association of Vehicle Manufacturers in Brazil - who as you know are THE ethanol fuel trailblazers of the world) which might give you some insight on what needs to be done to run ethanol fuels. The english grammar is a bit messy because of the translation, but the gist is there.




Blending 98 with E-Flex is going to give you about 56-68% ethanol so you do need to take extra care with it's use. If the components have not been changed to be ethanol compatible, such as the pipes, seals, adhesives and even some metals like aluminium then you should definitely not leave the fuel sitting in the tank for extended periods.

Any increased erosion/corrosion will be gradual but the likelihood increases with the time ethanol is in contact with the seal, adhesive, rubber etc, so it may be good practice (after the ethanol fix) to drain the tank and flush the system and lines with 100% petroleum to make sure it's all washed off.

So that's what I know -- I also know there are hundreds of people using it with great success so it's just a matter of knowing what's going on in the engine, the fuel and managing it. There are just some realities with some vehicles and ethanol but I think there can still be a lot of fun to be had.

I hope that helps.

Kind regards


if anyone wants to host the pdf file for me let me know and i will send it over
im not too sure how she got the 56-68% ethanol bit i will try and clarify that soon

I'm pretty sure when he says that you'll end up 56-68% ethanol with blending it with 98 means that THEIR 98 ('Vortex') probably already contains a fair bit of ethanol already. So 'Vortex' is probably cheap swill 91 mixed with ethanol to bump up the octane. 
 
It sounds like its long term use would definitely be detrimental to the car, unless your willing to fork out lots changing most of the fuel system. IF you are going to use the 80/20 mix then you'd be wise to stick with other 98 fuels (eg. Ultimate) that don't contain any ethanol to bump up the octane. But of course its quite convenient to fill up with Caltex 98 while you're there getting the E-Flex! 

"give you about 56-68% ethanol" !!
Now isn't that an interesting proposition! Under gov legislation 10% is the maximum allowable level and must be branded (exclude flex-fuel), with 5% un-branded, although waivers 'are' issued under certain circumstances. Trouble is vehicle manufacturers won't honor warranties where more than 10% is involved...hmmmm.
Are you sure he knows the 80% is 98 and not the other way around.

MRTurbo I'm pretty sure when he says that you'll end up 56-68% ethanol with blending it with 98 means that THEIR 98 ('Vortex') probably already contains a fair bit of ethanol already. So 'Vortex' is probably cheap swill 91 mixed with ethanol to bump up the octane. 

 
I'd love to know if this is the case. I use Caltex 98 pretty regularly, but I won't if it's bumped up 91.  A friend with a Golf GTI says every time she runs Caltex fuel, the car doesn't go as well... and maybe this is the reason!

whenever the conv comes up about which 98oct fuel people use i always hear neg stories about caltex 98.

guys the person got the ratios mixed up the wrong way like muman mentioned lol
im still waiting on the reply stating what the long term consequences will be running the 80/20 mix

the pdf that Purple5ive was talking about is located here