Petrol

[ARTZ]

OK, I remember reading in a topic here somewhere , someone said that it is stupid to use the premium fuels as they are not monitored or something..and im starting to think they may be right

The reason for this >> i have a duel fuel vehicle that runs on gas 95% of the time, occasionly ill run out of gas and be forced to run on petrol..

Now because the gas timing is more advanced than what a normal petrol engine would be i get horrible pinging . by accident i found the remedy for this was to use premium fuel. And although it still runs a bit off , it doesnt ping .. So now i always use premium fuel even though its an old mazda ute

(I swear some people think im nuts when they see me fill it up)

But anyone who has experienced deathly pinging will understand

Anyway i have noticed at times , that although i have filled up with premium it will Ping like crazy and im starting to wonder if this is because that premium pump was actually giving me regular fuel therefore ...........RIPPING ME OFF

Can anyone shed some light on this subject...............................................

Edited December 15, 2009 by doozooby

[The Bogan]

Yes they are thieves, RON can be from the 80s to over 100, the quality control is shocking, that and dirty fuel.

[ARTZ]

But do we know its the petrol companies themselves or is it just pov petrol stations trying to make an extra buck by selling regular in premium pumps?

And isnt regular fuels octane rating around 80ish anyway..?

Would i be better off spending my money on octane booster...?

Edited December 15, 2009 by doozooby

[VB-]

regular fuel is 91.

are you sure you havent gone from 98 oct premium to 95 premium and maybe thats why its detonating?

[ARTZ]

Positive, only ever put premium, usually bp ultimate, or vortex..

was almost empty , put 40$ bp ultimate last friday, ran out of gas this arvo, after this it was driving like crap even on the freeway it would just run out of power, sort of a fading feeling (like when a lpg car is out of fuel) and pinging under load

It often does this, but it is worse than usual....Hmm..Maybe my filters dirty...

Will replace it tomorrow to be sure...still doesnt explain pinging!

.

Edited December 15, 2009 by doozooby

[mad082]

if the fuel filter is very dirty then it may be restricting the flow and causing it to lean out and ping. or the injectors (if it has injectors) may be dirty.

if it is a carby engine then that may have an issue. you may also have a fuel pump issue.

and don't you use hotter spark plugs with LPG? if so the timing might be too advanced for the fuel. you have to remember that LPG generally has an octane rating of well over 100, so even using 98 octane would be like using 91 octane fuel in a turbo car. also if you don't put fuel in very often it could be going stale in the tank. higher octane fuels lose their octane rating faster than lower octane fuels. so even though you put fresh fuel in recently, if the old fuel had been in there a while then it could've gone stale and you would still result in an overall octane rating of less than 98.

[.:: GimpS-R34 ::.]

maybe you should take this info to the top.. today tonight

[Kujotk]

if your serious about your fuel, only go to petrol stations and major bizzy roads that are bizzy..............

the ron of fuel will quickly become lower if for instance it is mixed around alot, exposed to higher than avaerage temperatures, or if it sits in a holding facility for a long period of time.

There is nothing you can do about the first 2 probs, but the 3rd prob (usually the culprit) can be avoided most of the time if you choose the right petrol station and at the right time to fill up.

If you know your local station gets a delivery every wednesday night, then fill her up thrusday morining. Alot of people dont know this but if you fill up right after or during a station refuel, the amount of shit that goes straight into your petrol tank is crazy if their 2ndary filters are old (most of the time).

The refineries are pretty strict when it comes to their stock leaving the depots, but once its in the petrol stations holding tanks then the fuel goes to shit.

DOn't know how practical it'll be for you, but if i see a tanker comming in to fill up the petrol station, i go back the next day to refuel, you will see for yourself if you have a temperamental car and you fill up hours before then tanker comes, then you do alot of driving that day, then the next day fill up with the fresher fuel.... but all depends on how much turnover the station has

[.:: GimpS-R34 ::.]

by bizzy he means busy

[R31Nismoid]

Fuel can be stored for MONTHS in tanks. I've spoken to Shell rep's about this before and 3 months without a worry, upto 6-9 months is no issue at all.

You'll be hard pressed to find a servo who's fuel has been there for a longer time than that.

Fuel compositon does vary @ times of the year. ie. Summer fuel batches are slightly different to Winter etc, but its overall nothing major.

Sounds like its a car issue, not a fuel issue. Being it is a OLD ute, i wouldnt be surprised either.

[ARTZ]

Its 2004, injected, when i say old i mean nearly 400,000kms

I do go through about half a tank a week so its not old, i think alot of it has to do with timing, but usually with bp ultimate it runs fine ,

like any car with advanced timing the best way to drive it is with quick jabs at the accelerator, and the speed keeps wanting to creep up, so im driving along the freeway and it would creep up so i would have to back off ,as you do, at which point i would get a horrible wobble, i was having a real hard time trying to keep it steady

I usually go to servos that are busy , i fill up every morning do about 300kms a day delivering stuff so i know what servos are good usually i go to the ones that have had recent revamps too with new tanks and pumps..And as you said the busy ones

Ill have to run this tank dry and see if i have the same problem with the next tank i think b4 i start blaming petrol stations

But it is running like absolute crap atm...

[sneakey pete]

regular fuel is 91.

You can actually buy 91 anymore? All i ever seem to see its 98, 95 and horrible 10% ethanol that i don't like to run.

[ARTZ]

Ok my apologies to those that are about to complain that this punk post whore has wasted valuable moments of there lives

But some may find this interesting ,

It appears climate change is affecting the running of my daily..

Thats right peeps climate change, it is real and happening and i am now witness to its being

When i say climate change i dont mean global warming , just the change in climate

Any of my fellow mexicans will now how damn hot it was last couple of days and how wet it was today, as it happens my car ran like clockwork in todays wetter weather..no pinging, none at all even when i sunk the boot into it

Still the usual flat spot but that is all

We all know how cool air makes our cars run better ,and in this case its what makes it run normal

I guess hot air and advanced time just dont work together at all

So there was nothing wrong with the petrol and there is nothing wrong with my car

Though it has developed a strange ticking noise that is a bit of a worry, but until it breaks ill just drive it

However i do still have the problem of Today tonight coming around tomorrow expecting a story...Any ideas

Edited December 17, 2009 by doozooby

[97R33MSPEC]

i would just like to add that i can tell you for fact that the refineries produce extreme variances on the RON rating of there fuels. i know of a certain refinery that at a very certain time of the month the octane rating can reach 106 and thats being sold as there premium. still do not know why this is, we believe it may have something to do with the staff working at the refinery at that given time.

anyway, believe me or not but its been tested so yeah. just food for thought.

[ARTZ]

i would just like to add that i can tell you for fact that the refineries produce extreme variances on the RON rating of there fuels. i know of a certain refinery that at a very certain time of the month the octane rating can reach 106 and thats being sold as there premium. still do not know why this is, we believe it may have something to do with the staff working at the refinery at that given time.

anyway, believe me or not but its been tested so yeah. just food for thought.

Are variances on all fuels or just premiums

Is there a way we can test fuel we buy?

[97R33MSPEC]

im sure that there are variances on every fuel that is made purely because of the simple fact that it is a product that is made from a process, and the process is not going to be 100% the same every time.

you can get personal use octane testers however im not sure how much they are worth, but you have to think that your not going arrive at a petrol station and buy a sampleof fuel to test before you fill up. I have tuned my R33 for 100octane which i purchase from the same place every time, its the only stuff my car has ever run on and going back on what you said in your original post, i have definitely noticed that some batches have made my car rattle at certain load points. sometimes its fine and i had taken ambient air temperature into the equation, however it still rattled on colder days with the same bad batch so the only common point was the fuel.

for people that are purely performance based i guess the only really way to be 110% safe is to tune for a fuel that has an octane rating a little lower then what you actually run your car on, that would give you an very safe buffer zone regardless of how hot the day gets, but of course it would compromise on your overall power output. its all compromise.

sorry have gone off to stuff that's irrelevant really as you are talking about a standard vehicle.

[.:: GimpS-R34 ::.]

Ok my apologies to those that are about to complain that this However i do still have the problem of Today tonight coming around tomorrow expecting a story...Any ideas

Use it to your advantage, do a piece on car enthusiasts and how only honda boys are hoons

[pixel8r]

However i do still have the problem of Today tonight coming around tomorrow expecting a story...Any ideas

This is more correct than what you may have intended. No one watches Today Tonight expecting the facts.

[ARTZ]

This is more correct than what you may have intended. No one watches Today Tonight expecting the facts.

My point exactly...maybe we should take this to the wasteland, home of all things bullshit

[mad082]

as a representative of wasteland i resent that comment...

nah i'm just kidding.