put wrong fuel in car - help

chunkytfg

Arklight wrote: »

Afaik super unleaded is just the same fuel with a higher octane content. Octane is a non combustible chemical that spaces out the petrol molecules. it allows for a form of pre-ignition in performance engines that inject fuel at high pressures.

Just WOW:eek::eek::rotfl::rotfl:

Some say a little knowledge is a dangerous thing however in this case the knowledge is just a means of appearing pretty stupid!! :rotfl::rotfl:

Probably best to click this - https://en.wikipedia.org/wiki/Octane_rating - before making any other comments!

Takmon

Arklight wrote: »

Afaik super unleaded is just the same fuel with a higher octane content. Octane is a non combustible chemical that spaces out the petrol molecules. it allows for a form of pre-ignition in performance engines that inject fuel at high pressures.

It shouldn't make any difference to a normal engine, other than that there is a tiny bit less combustible petrol in a litre of high octane fuel, compared to the 95 equivalent.

Those pesky fuel companies are at it again; they increase the octane number to space out the fuel molecules which would increase the volume the fuel takes up. They then have the cheek to charge more for higher octane fuel when you actually get less fuel per liter due to all that extra space!

Next time you go to a fuel station make sure they have the molecule spacing compensation module installed on each pump that dispenses higher octane fuel. If you can't see it then go in and ask about it before refilling so you don't get ripped off.

LandyAndy

It's why performance cars all have huge fuel tanks. To allow for the petrol molecules occupying more space.

almillar

Octane is a non combustible chemical that spaces out the petrol molecule

Somebody's spaced out alright!

No harm will be done. The car wants 95 octane, and has put in 97 or 98. The engine just won't take advantage of the higher quality fuel. There MAY be additives in it that MAY clean the engine and MAY make it better, or MAY make it worse!

Manxman_in_exile

oldagetraveller wrote: »

Nothing to worry about. According to some, though, your car will be much faster, much quieter, you'll achieve more m.p.g., cleaner exhaust etc..:rotfl:

You sound just like the bloke that told me that. You're not him, are you?

Manxman_in_exile

almillar wrote: »

Somebody's spaced out alright!

No harm will be done. The car wants 95 octane, and has put in 97 or 98. The engine just won't take advantage of the higher quality fuel. There MAY be additives in it that MAY clean the engine and MAY make it better, or MAY make it worse!

They didn't tell me that bit.

01afraser4

iammumtoone wrote: »

I just put super unleaded in rather than unleaded


Does this matter? Car was empty before I filled and by the time I realised I had put in 3/4 tank. Should I top it up to full with normal unleaded? Or does it make no difference (apart from the cost) my car is a 6 year old basic 1.2 engine.


EDIT: just looked a the fuel cap it says to use super 95 octane.


Thanks

I really need to ask a question as it is amusing me slightly... Did you fill your car up at a garage and then stand about waiting to get an answer on this forum before driving off? :rotfl:

iammumtoone

01afraser4 wrote: »

I really need to ask a question as it is amusing me slightly... Did you fill your car up at a garage and then stand about waiting to get an answer on this forum before driving off? :rotfl:

:rotfl:NO.


I know enough to know its not like putting diesel in but wondered if I should top up with normal and maybe keep topping up once I got back down to 3/4 tank to keep diluting it. I certainly realised driving home wouldn't harm anything.



I started having concerns when I googled and some of the petrolheads forums say it could damage the engine but I suppose they are referring to prestige cars not my little run around!

iammumtoone

Scrapit wrote: »

Petrol in a petrol car. What's the problem here?

The wrong type of petrol. I don't know what the difference is (apart from cost). I think its reasonable to ask if you are not sure.

molerat

Damage is usually caused by using lower octane fuel in cars that require higher.