purjo cars

[very-near]

Ok thanks all ill stick some in. (should of bought a Kia)

Regards..........

Damned right, they are easier to spell

A m/cycle engine from a bike like a Yamaha R1 will consume 1 litre of oil every 1000 miles and this is considered to be normal (they do rev very high though, and have thinner rings for less friction on the pistons).

Diesel engines need their oil changing more regularly because the pressure is so high in the combustion chamber, that it forces diesel fuel past the oil scavege rings into the sump. This offsets the proper engine oil and gives the illusion that the level is OK, but as diesel has no real lubricating properties, it helps to wear out the engine much faster - hence a petrol car has a oil change every 10-12,000 miles and a diesel car every 6,000 miles.

 

[Mr Pig]

should of bought a Kia

Now there's a statement you don't hear every day!

 

[Night Train]

Diesel engines need their oil changing more regularly because the pressure is so high in the combustion chamber, that it forces diesel fuel past the oil scavege rings into the sump. This offsets the proper engine oil and gives the illusion that the level is OK, but as diesel has no real lubricating properties, it helps to wear out the engine much faster - hence a petrol car has a oil change every 10-12,000 miles and a diesel car every 6,000 miles.

Mine doesn't.
It has an oil change around 10k+ miles as modern diesel oils are rather good quality compared to those used in the 70's. Also diesel is quite a good lubricant, unlike petrol, ask any motorcyclist. Diesel fuel lubricates the diesel pump and injectors and they are precision bits of kit working at high pressures and speeds for 200,000+miles without service.
If there was sufficent excess diesel fuel in the cylinder to affect the sump level then the engine would be producing clouds of black smoke and have a fuel efficiency less then a petrol engine.

It is usually petrol engines running rich that scours off the lubricating oil from the piston rings causing wear, compression loss and oil smoke.

 

[Over The Hill]

A can of oil is £20 ish. An engine rebuild is £2,000 plus.

Argue all you like but the fool runs it on old oil the wise man spends £20 and twenty minutes changing the oil.

 

[Mr Pig]

Argue all you like but the fool runs it on old oil the wise man spends £20 and twenty minutes changing the oil.

Agree.

 

[Night Train]

A can of oil is £20 ish. An engine rebuild is £2,000 plus.

Argue all you like but the fool runs it on old oil the wise man spends £20 and twenty minutes changing the oil.

True, that's why I get mine changed at every service, 10,000 (give or take) miles or when the engine management says sooner. 140,000 miles and no faults.

 

[Bromptonaut]

Modern engines (and even old ones for all I know) tend to consume a bit of oil in the first 10k miles. You really should check it regularly and top up as required. Twenty thousand between services does not mean it never needs looking at in between!

Having said that if all you got was a flash from the electronic dipstick I doubt there is any lasting damage. The oil pressure light on the other hand tends to come on 20 seconds before the engine destroys itself.

 

[Black Sheep]

i'd go with topping it up a bit (check when engine is cold) and seeing how it goes on, it could just be seals bedding in etc

Peugeot aren't that shockingly bad with build quality, they build diesels for BMW!

 

[Ron]

Deisel engines turn oil black very quickly. Heard of two cases of engines running on their own engine oil. Bewildered driver standing outside the car with the keyes in his hand while the engine screamed to death! If it happens to you put it in top gear and stall the engine with the brakes on. Then get on your bike and call the garage!

 

[Mr Pig]

Having said that if all you got was a flash from the electronic dipstick I doubt there is any lasting damage.

That depends on the engine. On an engine with a timing chain rather than a belt for instance the chain can be running dry before the oil passes the lower dipstick mark. Sad but true. You're always better keeping the oil near the top mark.

However over filling can be just as bad. Too much oil can blow oil seals and in some cases the bottom of the pistons can hit the oil in the sump and get bent.

 

[very-near]

Mine doesn't.
It has an oil change around 10k+ miles as modern diesel oils are rather good quality compared to those used in the 70's. Also diesel is quite a good lubricant, unlike petrol, ask any motorcyclist. Diesel fuel lubricates the diesel pump and injectors and they are precision bits of kit working at high pressures and speeds for 200,000+miles without service.
If there was sufficent excess diesel fuel in the cylinder to affect the sump level then the engine would be producing clouds of black smoke and have a fuel efficiency less then a petrol engine.

It is usually petrol engines running rich that scours off the lubricating oil from the piston rings causing wear, compression loss and oil smoke.

Try this test.

Drive one driven wheel of your car onto a steel sheet. get a bit of diesel and lubricate the steel plate under the tyre. With handbrake on (& chocked) and in 1st gear at say 2000rpm, spin the wheel and time it until the tyre starts to smoke.

Now repeat this experiment with engine oil.

Which one lasts the longest before smoking ?

I am a biker, and have come off on oil, but whether diesel or engine I'd not want to commit to.

 

[Mr Pig]

That's not really a fair test. Just because one is better at a certain temperature between certain materials does not automatically mean the same will be true in different conditions. I'm not saying you're wrong, just that this test doesn't prove anything.

 

[very-near]

That's not really a fair test. Just because one is better at a certain temperature between certain materials does not automatically mean the same will be true in different conditions. I'm not saying you're wrong, just that this test doesn't prove anything.

The thing is that the component in an engine run in a film of oil. The thicker the oil the better it lubricates, and the higher pressures it can withstand in its application

This is why gearbox oil has an SAE of 80 or 90 and general engine oil which has to be runny enough to be pumped into the cylinder head has an SAE of about 30.

Gearboxes used in drag cars have to use up to an SAE of 250 to withstand the enormous pressures they are subjected to when 1000-5000bhp is put through them.

Diesel by comparison has to be runny enough to be forced at very high pressures through an injector. The injector pumps don't run metal to metal, the moving parts float on rubber seals.

It is a very deep subject (surprisingly) and I read an article a few years ago which explained how synthetic oils worked as well as some very compelling arguments to do regular oil changes.

Don't take my word for it though read up about it HERE