Mixing fuel - engine warning light.
Discussion
Pfft, bit annoyed at this, Mondeo st220, 2004.
Was low on fuel a while back so decided to put some of the jungle juice in to see if it ran a little better. Put in £50 of BP ultimate and it ran a little smoother and seemed all good.
Recently low on fuel (as usual) and went to the nearer Shell garage. Now for some reason, (and we all have one of these im sure), it has no v-power. It has v-power pumps, but never has and never will, remove those 'sorry no v-power' covers from the pumps.
Had to use standard shell, £40 in, within about 20 miles, engine light on.
It might not be connected but i guess it is. The car runs fine, mpg is fine, light has been on for about 2 weeks with no problems.
Stupid s
tty shell petrol station near me. Either that, or stty bp ultimate. I heard on here recently (i think) that people had problems with ultimate in the past.
Was low on fuel a while back so decided to put some of the jungle juice in to see if it ran a little better. Put in £50 of BP ultimate and it ran a little smoother and seemed all good.
Recently low on fuel (as usual) and went to the nearer Shell garage. Now for some reason, (and we all have one of these im sure), it has no v-power. It has v-power pumps, but never has and never will, remove those 'sorry no v-power' covers from the pumps.
Had to use standard shell, £40 in, within about 20 miles, engine light on.
It might not be connected but i guess it is. The car runs fine, mpg is fine, light has been on for about 2 weeks with no problems.
Stupid s
tty shell petrol station near me. Either that, or stty bp ultimate. I heard on here recently (i think) that people had problems with ultimate in the past.Read the codes, prolly a weak sensor.
Most cars will run with no issues even on 95 RON, knowing people who work for Shell some of the claims over 'super' are complete rubbish. Worst case is the 98's and above will give you bugger all, but cost you a chunk of money. I have run tuned engines back to back on AVGAS and pump fuel for running in and det wise there isn't too much in it, especially if you have closed loop control which I am guessing 99% of all modern cars have?
Most cars will run with no issues even on 95 RON, knowing people who work for Shell some of the claims over 'super' are complete rubbish. Worst case is the 98's and above will give you bugger all, but cost you a chunk of money. I have run tuned engines back to back on AVGAS and pump fuel for running in and det wise there isn't too much in it, especially if you have closed loop control which I am guessing 99% of all modern cars have?
clarkey328is said:
Sorry but that just doesn't happen.
Its ok you dont have to be sorry, obviously you have never seen the silt and crap that can end up in the bottom of a tank, undisturbed for years until a tank is run so low, that it starts to mix with the remaining fuel and can be drawn through the pick up, through the pump and into the filter. I made a suggestion, as a possible problem, it is unlikely, but to say it doesnt happen is wrong in itself.Another possible, is a code flagged up for low fuel pressure, insufficient fuel in the tank may cause the pressure to drop fractionally in the fuel rail, throwing a code.
ST220 was mapped for 95 RON so there will not be an issue with the octane. 02 sensor can and do fail, reading the codes at this stage os the quickest way to resolve the problem, but never overlook the basics.
Kidders said:
Another possible, is a code flagged up for low fuel pressure, insufficient fuel in the tank may cause the pressure to drop fractionally in the fuel rail, throwing a code.
ST220 was mapped for 95 RON so there will not be an issue with the octane. 02 sensor can and do fail, reading the codes at this stage os the quickest way to resolve the problem, but never overlook the basics.
A couple of good steers there - O2 sensors seem to be a consumable on Ford engines (friend's company Mondeo 2.0 ate several, and I've seen failures on Focus and KAs too.)ST220 was mapped for 95 RON so there will not be an issue with the octane. 02 sensor can and do fail, reading the codes at this stage os the quickest way to resolve the problem, but never overlook the basics.
Kidders said:
Its ok you dont have to be sorry, obviously you have never seen the silt and crap that can end up in the bottom of a tank, undisturbed for years until a tank is run so low, that it starts to mix with the remaining fuel and can be drawn through the pick up, through the pump and into the filter. I made a suggestion, as a possible problem, it is unlikely, but to say it doesnt happen is wrong in itself.
Where do fuel pumps draw from?clarkey328is said:
Kidders said:
Its ok you dont have to be sorry, obviously you have never seen the silt and crap that can end up in the bottom of a tank, undisturbed for years until a tank is run so low, that it starts to mix with the remaining fuel and can be drawn through the pick up, through the pump and into the filter. I made a suggestion, as a possible problem, it is unlikely, but to say it doesnt happen is wrong in itself.
Where do fuel pumps draw from?clarkey328is said:
Where do fuel pumps draw from?
From the bottom of the tank ! correct 
The main cause of crap in the filter is rust and water, a constantly empty tank will rust quicker and delvelop condensation more than a tank allwys brimmed, floating debris will cause a problem in a run low situation but not debris that sinks so in an clean tank even one full of rust running low wont be an issue.
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