Petrol in a Diesel 90 Defender

[tony wright]

Update, just been round to his house and car started and drove as per normal. Said his plan is now to keep topping it up with high performance diesel every thirty or forty miles and not bothering to get it drained and flushed. He normally keeps his cars for 10 years plus, his 90 was always going to be a keeper and he is certainly not short of a bob or two so I suppose any future damage will be dealt with as and when it's required.

I'll mention the two stroke oil tomorrow, does he just put it into the fuel tank and is two litres the amount required?

[JakeT]

200:1 is a good ratio I've been told a litre is too much. It's basicslly there to lubricate everything and keep it all clean. But a litre sounds like too much to me. I'm sure Google has a lot of info on it, also.

[oilslick]

TheInsanity1234 said:

Oh, ah.

So it's not actually the fact it stops the engine from igniting the fuel, but more a case of it causes the engine to seize up because of not enough lubrication?

That explains why my mum's friend managed to fill her tank up with petrol (diesel '06 Galaxy, and yes, she was a ditzy blonde woman, and her ex always filled it up for her) and drove it the short distance to our house (<0.25 miles) and ended up needing to have a very, very expensive engine rebuild.

And also explains why if you only put a bit of petrol in, then brimmed the tank with diesel, you'd just get rough running for a while as the petrol thins out the diesel.

No, engines are lubricated by engine oil The lack of lubrication primarily affects the fuel pump. When it's not being properly lubricated then you can end up with swarf in the fuel system that can knacker not only the pump, but injectors, filters, fuel rail etc.

Fortunately it doesn't happen as often as manufacturers would have you believe.

[gizlaroc]

tony wright said:

I'll mention the two stroke oil tomorrow, does he just put it into the fuel tank and is two litres the amount required?

Normally recommended at 200:1, but I usually stick 1/4 litre in every tank (70 litre fill up) and runs a treat.

In the case of having 10 gallons of petrol in there I would stick a litre in at least.

[TheInsanity1234]

oilslick said:

TheInsanity1234 said:

Oh, ah.

So it's not actually the fact it stops the engine from igniting the fuel, but more a case of it causes the engine to seize up because of not enough lubrication?

That explains why my mum's friend managed to fill her tank up with petrol (diesel '06 Galaxy, and yes, she was a ditzy blonde woman, and her ex always filled it up for her) and drove it the short distance to our house (<0.25 miles) and ended up needing to have a very, very expensive engine rebuild.

And also explains why if you only put a bit of petrol in, then brimmed the tank with diesel, you'd just get rough running for a while as the petrol thins out the diesel.

No, engines are lubricated by engine oil The lack of lubrication primarily affects the fuel pump. When it's not being properly lubricated then you can end up with swarf in the fuel system that can knacker not only the pump, but injectors, filters, fuel rail etc.

Fortunately it doesn't happen as often as manufacturers would have you believe.

Well, I've just revealed my lack of knowledge

[Schtum]

gizlaroc said:

Normally recommended at 200:1, but I usually stick 1/4 litre in every tank (70 litre fill up) and runs a treat.

In the case of having 10 gallons of petrol in there I would stick a litre in at least.

Low ash synthetic ? I don't s'pose it's a very good idea with a cat' and DPF though...

[gizlaroc]

Better than petrol though!!

Seriously, you could put a fully synthetic low ash in there if you felt the need, but I would just want something in there quick.

When I did it to the ML I put a litre of aviation oil in there, but that was a bit ott.