Adding Diesel to Petrol.

**DrHalo** · 6-14-07, 11:59

I spoke to mechanic friend of mine today, he reckons adding a liter of diesel to every 59 liters of fuel with every fillup will help reduce/eliminate carbon buildup in the cylinders.

Has anyone tried this or know that this works? is it safe? or is it a fallacy?

**Karaha** · 6-14-07, 20:50

Mixing Gasoline And Diesel

Although this is essentially the opposite of what you want to do, it doesn't

sound a like a good idea anyway.

**Graham_A_M** · 6-14-07, 21:38

A liter is REALLY too much, I add about 200mL every few gas tanks, via a small jerry can.... with 1L your asking for trouble, seriously. But yes most fuel conditioners actually have a little bit of diesel in them, as it certainly does clean out the contaminents in the engine.

**DrHalo** · 6-15-07, 15:49

Thanks for the input guys, i added 1lt of the Diesel to a near empty tank and filled her up with 55lt 95octane.

Will report on the results...

**fredio54** · 6-16-07, 6:23

diesel is a light oil, and if anything will promote smoke and carbon. much like running two stroke fuel would...

also like the other guys article stated, it will lower the octane, though only proportionally, so probably a non issue. but i cant see it doing any good.

these yanks love adding stuff into perfectly good liquids.

why dont you chuck some atf into the engine before your next oil change too.

fred.

**DrHalo** · 6-16-07, 6:49

Thank you for the warnings, it is a bad idea.

Not only does it smoke at startup, but also 'pings' at low RRM under load for some reason(probably due to the decreased octane rating, fredio54 ?).

I 'wasted' some fuel on the higway and then topped her off again (15 litres) ,fortunatley, no permanent harm done

.

**mx_masta** · 6-16-07, 7:56

Not yet anyway.

DimaK · 6-16-07, 9:34

gas to diesel in winter time yeah, but diesel gas, i donno........don't sound good to me

**fredio54** · 6-16-07, 12:27

most likely the octane decrease. interesting that its that pronounced. which engine is that on? perhaps its a touchy one?

fred.

**DrHalo** · 6-16-07, 12:38

It's on the 2.5v6 (KLDE)
Funny, ive never seen any kl motor do it, ever.

But, after a bit of 'fuel dilution' it's happy again.

Could the diesel cause the petrol to foam?

**Graham_A_M** · 6-16-07, 21:07

^ LOL! buddy, thats why I suggested 200ml, it's 1/5 of the dose you gave your car.
Its funny you said "Thanks for the input guys" only to ignore my advice and do the same thing anyway. What was intial point of this thread then?

**DrHalo** · 6-17-07, 3:37

Since no-one had actually ran diesel at a 1:59 ratio, an experiment had to be done to to test the hypothises, to gather observable evidence.(Although, I still don’t know exactly why it is bad, except for possible cataclismic octane-number reduction).

I suppose, this could be regarded as a waste of a thread, if I wasted anyone's time I apologize.
At least now, we have some evidence to suggest that running a 1:59 diesel:gasoline mix, in a KL-DE, is a bad idea.

Graham is 100% right:

Quote:

A liter is REALLY too much, I add about 200mL every few gas tanks, via a small jerry can.... with 1L your asking for trouble, seriously. But yes most fuel conditioners actually have a little bit of diesel in them, as it certainly does clean out the contaminants in the engine.

td435br · 6-30-07, 19:35

use very small amounts like a table spoon for a full tank. if not youll smoke, throw codes and possibly stall. becarefull with this, if your not sure dont use it. i wouldnt