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Petrol in Diesel engine

MikeL

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Sep 9, 2004
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Torquay
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Audi A4 3.0 TDI
Has anyone bought or used one of those fuel filler adapters that won't permit entry of a PETROL nozzle but will allow DIESEL, thereby stopping mis-fuelling?

And are they any good, which if any are recommended.

For those that don't know I am about to buy my first diesel, indeed the first diesel anyone in the family has bought.......

Mike (the paranoid :eek:)
 
For what it's worth..........

I once put 60 litres of petrol in my (very) old diesel Landrover defender.
It drove away from the petrol station fine, but was coughing and spluttering by the time I got home. Obviously I immediately checked the reciept, and found the problem :doh:, My dad towed me to the local mechanic with his Discovery (which he said was very hard work - Whoops....I left the handbrake on :doh::doh::doh::doh:)

Once the mechanic drained the tank and flushed the fuel lines, refilled with diesel, and it jumped straight back into life. Bit of smoke initially, but we were away.

Dad thought it was hilarious until about 3 months ago when he did the same thing with his Disco, and i wa my turn to get the tow rope out.

It's something that you'll only ever do once.
But i'm led to beleive it's faaaaaaaaaaaaaaaaaaar worse the other way round. Diesel in a petrol engine :crazy:
 
In my opinion diesel fuel on a gasser is not as harmful as gas on a diesel. The gasser probably just won't start and needs a flush but the diesel may need a lot of parts replaced, like the high pressure pump.

What king of an adapter would this be? We have a small diesel fuel nozzle if the fuel is low sulphur, which all diesel fuel is and has been for a long time. Only the ones for big trucks are so big that I cannot fit one to my car (intended for filling 1000+ litres). I cannot see how one could prevent the lead-free gas filler being inserted to a diesel (unfortunately). Those leaded gas nozzles were big but those do not exist any more.

PS. when my wife changed from a gasser to a diesel, I put a big plastic sheet to the filler neck, folded on top of the filler cap and "diesel" written on with big letters.
 
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This is the thing I'm looking at:

Solo Diesel - How To Install?

Don't like posting companies as might be thought I'm plugging them, I'm NOT.

Mike

Be interesting to see if it works as claimed....its very expensive for a fuel cap (but very much less expensive than putting incorrect fuel in!)
 
£40 for a C class one. Thats a rip off. When I fill my car up, it says diesel behind the filler flap, on the cap itself and and on a red ring around the filling hole.

I have owned several petrol and diesels and Ive never thought twice when refueling. You instinctively know. Each time I drive into a garage I look srtaight at the diesel pump, its automatic.

I wouldnt worry about it, but I guess that product would work if you wanted to spend £40 on one. I thought diesel nozzels are a slightly different shape as well as being wider.
 
I always wonder how people get derv into any modernish car with the much smaller filler hole.

Bloke at work his wif did this recently, he asked her about the nozzle size and she said she gave up after a fivers worth as it was taking ages to fill up.

Diesel in a petrol not to bad drain and new fuel, hope cats okay.

Petrol into any modern common rail diesel is very very bad news, seen it at work a few times on transits, new injectors,new high pressure pump and tank off to flush out the swarf from the knackered high pressure pump, the swarf gets everywhere.



Lynall
 
Wife did this (once!) on an old Citroen synergy we had - it was an old style diesel thankfully - she drove back the mile or so from the garage to ask me whether it was likely to be a problem:doh:
 
Back in 1984 at a firm i worked for, a guy filled up a AEC Mandator with petrol & the engine had to be rebuilt, 2 weeks later same guy filled up the BMC 350FG with petrol ! That pushed the boss too far, SACKED !!!
 
Years ago people would add a small amount of petrol to diesel in the winter months to stop it thickening at low temperatures. I also remember diesel pumps in some filling stations giving loud beeps when you lifted the nozzle from the cradle - used to frighten the s*** out of me with a hangover, which is the only time I've ever put the wrong fuel in. Fortunately, I realised before I started the engine, so no harm done, other than the obvious.

Diesel engines and fuel have advanced incredibly, and as said above, todays engines don't like it up 'em!
 
I've ordered the SoloDiesel, I agree £40 is a bit pricey however when you consider something like a TomTom suction mount is £20 everything is relative -

I like the idea of not removing a screw cap, call it £30 for device + £10 for a bit of convenience, and of course new gadget - priceless!

Car due in about three weeks so I'll let you know how it goes.

Mike
 
I only did it once - in a works van - and realised after I'd put only a fiver's worth ir so in : I just filled the rest up with diesel and it was none the worse .

My dad had a road haulage business back through the 50's , 60's and 70's and we used to mix petrol with the diesel during the winter to stop the fuel waxing up , so I didn't panic .

I've never owned a diesel vehicle and have no plans ever to .
 
That's the nub, the diesel hole is big m'lord and the unleaded nozzle is thin and weedy - will fit a treat if a little loose :crazy:

Similar product featured on Dragon's Den

The Fuel Angel - The Misfuelling Prevention Device

Been to this website but could not find explanation of how it works. Given that the unleaded pipe is smaller than the diesel pipe, can anyone explain how this works please? Seems to have passed numerous tests.
 
I suspect the wider diesel nozzle will engage with a switch or suchlike while the narrower petrol nozzle just hits the end without opening the valve.
 
I suspect the wider diesel nozzle will engage with a switch or suchlike while the narrower petrol nozzle just hits the end without opening the valve.

Pretty much correct, the diesel nozzle size "activates/releases" the cap - a petrol nozzle won't do this.

The thing I find unwieldy is that you use the nozzle to, for lack of a better word, pry off the cap, you then remove the cap from the nozzle and insert said nozzle in the neck as per usual - seems a bit of a faff?

Mike
 
Update

Update on anti petrol thingy - it pretty much does what it says on the box, as noted prior I think it is a tad too expensive, however it is very well constructed - the instructions are a wee bit lacking. You must have the cap orientated correctly - what it doesn't tell you is that once the cap is tight you can go on turning (via ratchet, similar to one of those kiddy proof bottle tops) until it is correct.

In use the only thing to be aware of is that you need to be careful inserting the nozzle, this is due to the (necessary) restricted space - in other word forcing it would likely jam.

The only other thing is longevity - will have to wait and see - the two cams/hooks (in red) and the spring loaded flap (behind the cams) are the only moving parts, they seem fairly solid.

All in all, really pleased.

dieselt.jpg


Mike
 
Have you tried to put petrol in it yet?

£40 for a C class one. Thats a rip off. When I fill my car up, it says diesel behind the filler flap, on the cap itself and and on a red ring around the filling hole.

I have owned several petrol and diesels and Ive never thought twice when refueling. You instinctively know. Each time I drive into a garage I look srtaight at the diesel pump, its automatic.

I wouldnt worry about it, but I guess that product would work if you wanted to spend £40 on one. I thought diesel nozzels are a slightly different shape as well as being wider.

:D I've regularly switched between petrol and diesel fuelled vehicles and never had a problem. No matter what anyone says you can always tell a diesel car!
 
Have you tried to put petrol in it yet?

Tried it at the petrol station, it wouldn't let you. Yes, I did tell the bloke behind the counter what I was doing!

Oh, and your hands don't get as smelly not having to handle the filler cap - so an unexpected bonus.

Mike
 

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