Viewing: What happens if you put petrol in a Diesel engine?

dacanko · 11-03-2009, 03:44 PM

Hi all,

yesterday I filled up my passat 2.0 TDI 170 Sport with 0.68L unleaded petrol. I have realised that quiet late, but after that I've putted another 60 liters of Shell diesel in it which is only 1:100 petrol to diesel.Do you have anynone experience with this? The car is new with 16k on the clock and I wouldn't be happy to damage in any way as this is my car. I am really starting worried about this. Some people saying it can damage the pump and all fule system in car.

I am not sure but i think my car is a common rail??? Can it damage the car in long term use? Can I brake down after few thousand miles because of this? The car is running o.k now.

Please let me know what I shpuld do or should I worried about the car?

***HDi fun*** · 11-03-2009, 04:31 PM

The 2.0 TDi engines are common rail motors. The sensible advice would be to get it drained to be honest.

If it were my car that's what I'd be doing

**Chris Green** · 12-03-2009, 07:57 AM

Quote:

Originally Posted by HDi fun

The 2.0 TDi engines are common rail motors. The sensible advice would be to get it drained to be honest.

If it were my car that's what I'd be doing

On top of that, I think my next port of call might be:-

http://www.caparorightfuel.com/contact/contact-us.asp

I'm thinking of getting one as I did once do the same thing. As far as I can make out, it screws on instead of the normal fuel cap and the centre section which swings back to allow fuelling will only do so when the correct width of pipe is pressed against it to unlatch it. That gets round the fact that diesel guns won't fit modern petrol cars, but petrol guns will fit diesel cars. It's also bright yellow which helps!

**pgarner** · 12-03-2009, 10:35 AM

Quote:

Originally Posted by HDi fun

The 2.0 TDi engines are common rail motors. The sensible advice would be to get it drained to be honest.

If it were my car that's what I'd be doing

now they are but the earlier ones were still running VWs PD system. not sure when they changed over, think it might have been around 2007 but would need to check

dacanko · 12-03-2009, 12:52 PM

Quote:

Originally Posted by pgarner

now they are but the earlier ones were still running VWs PD system. not sure when they changed over, think it might have been around 2007 but would need to check

could u please find out ? i really haven't got a clue ...

thanks

**pgarner** · 12-03-2009, 01:30 PM

Sorry mate done some digging, audi seemed to swap to them straight away while VW filtered them in slowly. the sorroco and passat from late 08 onwards (realistacly the last 5 months or so ) are common rail but not sure of the rest.

no experiance on these engines but the power is the same the only difference is the common rail use 1 high pressure pump where as the PD uses 1 per cylinder (4 in your case) a call to a VW master mechanic might be an idea to find ot for sure

***HDi fun*** · 12-03-2009, 09:35 PM

All the VW 2.0 TDi are common rail. The 1.9 (1896cc) units are the PD engines. These, too, are not especially tolerant of petrol or other solvents in the fuel. They will probably stand a little of it as the PD cars didn't have particle filters IIRC.

Apparently you can add quarter litre of ATF if you have made a mistake and added some petrol. Personally I'd get it drained, flushed and primed.

**pgarner** · 12-03-2009, 09:45 PM

they are now but not origninally
i know its wikpedia but any search show it up
http://en.wikipedia.org/wiki/List_of...I_PD_100-125kW

**pgarner** · 12-03-2009, 09:56 PM

the 2008 audi A4 was the 1st to be swapped over from the PD to the CR engine. then the octavia VRS and Golf recived it.
not sure if seat has changed yet found a post on the seat cupra site that was dated october last year saying seat had announced they were changing but not a date

***HDi fun*** · 13-03-2009, 06:06 PM

OK - I stand corrected. Thanks v much

***waynne*** · 14-09-2010, 12:10 PM

Over 11,000 page views on this thread, it could be our busiest thread yet!

(Not bad and it's not even stickied!)

**jarrus** · 14-09-2010, 05:56 PM

I know people who use Veg oil in there diesels and use petrol to thin it down a bit when it get's cold (10% petrol and 90% veg oil)

No problems at all,

Putting Diesel in a petrol engine would be far worse to do,

I'd love to run a diesel off some of that Nitro Meth R/C engine fuel to see if it works (in theory it should)

but I dare say the engine would go boom first

***HDi fun*** · 14-09-2010, 05:59 PM

Quote:

Originally Posted by jarrus

I know people who use Veg oil in there diesels and use petrol to thin it down a bit when it get's cold (10% petrol and 90% veg oil)

No problems at all,

Putting Diesel in a petrol engine would be far worse to do,

I'd love to run a diesel off some of that Nitro Meth R/C engine fuel to see if it works (in theory it should)

but I dare say the engine would go boom first

Be careful with untreated RVO/SVO. It's not just viscosity which is the problem.

Petrol into a diesel car is far worse than the other way around. CR diesels use insane fuel pressures and petrol simply does not have enough lubricity.

You will also almost certainly trash the particle filter on cars thus equipped.