Diesel vs petrol

[ice_cubes]

get a quote on a Diesel engine if it was to break. Injectors alone I think runs at R 2k EACH That's R8k just for injectors. /faint

Dont these parts get covered by warranty though?

 

[Drifter]

Not injectors no, wear and tear item.

 

[skinndeep]

My injectors for Renault clio mk3 were R400 a pop :/ and also new turbos don't need a idle at the end anymore. All new cars that my brother came past have pumps that run for 3 mins after ignition key is taken out

 

[Pox]

The reason for idling before switching off is to let the turbo cool off. During operation, especially when driving on the highway, the turbo spins up and reaches incredible rpm's. This generates a lot of heat and the turbo will become red-hot.

While the engine is running, oil/cooling fluids are pumped through the turbo. This means that the temperature is kept under control.
The moment you switch off the engine, no more oil is pumped through the turbo. This means the heat is not carried away. The heat is now dumped into the air and into any surface in contact with the turbo, usually bushes/bearings. These surfaces aren't meant to handle that much heat. An Audi mechanic friend of mine told me that most turbo failures he saw was due to the bushes "burning through". Alternatively the turbo will just disintegrate.

It is possible to install a "turbo protector" on some diesel engines. This device keeps the oil pumping through the turbo even after the ignition has been switched off. Some, not all, modern diesel cars come with a similar system pre-installed.

Usually when driving around town at 60km/h, chances are the turbo won't get that hot and will have cooled down by the time you want to switch off.

For myself, I always wait 30-60s before switching off. That is time well spent when compared to the cost of replacing a turbo.

Just want to add that the heating of the turbo isn't from its spinning, it gets hot because it is spun by the hot exhaust gasses.

 

[PsYTraNc3]

Till something goes wrong.

On a Petrol engine a repair is cheap and mechanics are plenty. If a Diesel engine breaks. Get ready to apply for a personal loan

I won't be keeping the car that long
Still covered under Warranty, Maintenance and Service plan so I would like to assume I do not have to worry about anything like that.

Luckily so far the only thing that broke on my car was a cigarette lighter and seat belt thingy which was replaced in no time at no cost to me.

 

[KatMak]

Interesting views here...

 

[ice_cubes]

My injectors for Renault clio mk3 were R400 a pop :/ and also new turbos don't need a idle at the end anymore. All new cars that my brother came past have pumps that run for 3 mins after ignition key is taken out

I'll make a note to test it this weekend. Dont want any nasty surprises in the long run

 

[Pitbull]

I'll make a note to test it this weekend. Dont want any nasty surprises in the long run

They are a serviceable part though. Only if they need to be replaced, it will put a pretty dent in your finances.

 

[PsYTraNc3]

My injectors for Renault clio mk3 were R400 a pop :/ and also new turbos don't need a idle at the end anymore. All new cars that my brother came past have pumps that run for 3 mins after ignition key is taken out

+1

Asked this question when purchasing my car and was told the same thing.
Was advised to idle a bit only after long road trips to keep the pump going a bit longer.

 

[Drifter]

In quite an exhaustive test done by car magazine petrol vs diesel, they actually found that you need to drive the diesel for at least 100K km's before the benefits of cheaper fuel start paying off.

 

[Sm00thSm0k3]

For a long time I was skeptical of diesel but took the plunge 1.5 years ago and have never looked back.
Love the torque at low revs and my fuel bill has decreased by almost 60% from my previous vehicle....between 7.4l/100 - 8.0l/100 on the daily commute and an awesome 4.7l/100 - 5.2l/100 on the long trips.

Will never buy petrol again.

 

[ice_cubes]

In quite an exhaustive test done by car magazine petrol vs diesel, they actually found that you need to drive the diesel for at least 100K km's before the benefits of cheaper fuel start paying off.

I assume its brand new?

 

[PsYTraNc3]

In quite an exhaustive test done by car magazine petrol vs diesel, they actually found that you need to drive the diesel for at least 100K km's before the benefits of cheaper fuel start paying off.

Strange... Here's my real world test.

My nephew bought an i20 1.4 petrol at the same time as I bought the 1.4D.
Same interest rate, same deposit, same service\maintenance plan, same fuel tank size.
I am paying R200pm more than him.

I do about 2500km pm and get an average of 850km per tank (up to 950 in winter), he gets 650km max.
that 850km means I have to fill 3 times instead of 4 if I were to take the petrol...

That +-R600pm saving per month after spending R200 per month for the car.
I'm sure we can then agree that I started saving from the first month?

 

[Pitbull]

Strange... Here's my real world test.

My nephew bought an i20 1.4 petrol at the same time as I bought the 1.4D.
Same interest rate, same deposit, same service\maintenance plan, same fuel tank size.
I am paying R200pm more than him.

I do about 2500km pm and get an average of 850km per tank (up to 950 in winter), he gets 650km max.
that 850km means I have to fill 3 times instead of 4 if I were to take the petrol...

That +-R600pm saving per month after spending R200 per month for the car.
I'm sure we can then agree that I started saving from the first month?

R200 per month x 54 month. You started with a R 10 800 disadvantage. You only saved R 7 200 the last 12 months. So in essence you're still behind

 

[TEXTILE GUY]

Strange... Here's my real world test.

My nephew bought an i20 1.4 petrol at the same time as I bought the 1.4D.
Same interest rate, same deposit, same service\maintenance plan, same fuel tank size.
I am paying R200pm more than him.

I do about 2500km pm and get an average of 850km per tank (up to 950 in winter), he gets 650km max.
that 850km means I have to fill 3 times instead of 4 if I were to take the petrol...

That +-R600pm saving per month after spending R200 per month for the car.
I'm sure we can then agree that I started saving from the first month?

Slightly off topic

My missus has the 1.4 petrol i20. We always joke around the braai, we want to put the Santa Fe engine into the i20.
Couldnt give a hoot about economy, it will be the zippiest i20 on the road....

I personally would have prefered the diesel i20, but the missus liked the petrol ..... for no apparent reason.

 

[PsYTraNc3]

R200 per month x 54 month. You started with a R 10 800 disadvantage. You only saved R 7 200 the last 12 months. So in essence you're still behind

I'll be trading the car in after 36 months.
R200*36=R7200.
If you look at it that way, I have just started saving R600pm!

 

[PsYTraNc3]

Slightly off topic

My missus has the 1.4 petrol i20. We always joke around the braai, we want to put the Santa Fe engine into the i20.
Couldnt give a hoot about economy, it will be the zippiest i20 on the road....

I personally would have prefered the diesel i20, but the missus liked the petrol ..... for no apparent reason.

That would be awesome!

In Iindia they sold the i20 with the 1.6 CRDI. Even that would be much more fun than the 1.4!

 

[ice_cubes]

I'm currently putting R700 petrol and getting around 600km

Will do the comparison with the diesel and see how the figures change

 

[Drifter]

Strange... Here's my real world test.

My nephew bought an i20 1.4 petrol at the same time as I bought the 1.4D.
Same interest rate, same deposit, same service\maintenance plan, same fuel tank size.
I am paying R200pm more than him.

I do about 2500km pm and get an average of 850km per tank (up to 950 in winter), he gets 650km max.
that 850km means I have to fill 3 times instead of 4 if I were to take the petrol...

That +-R600pm saving per month after spending R200 per month for the car.
I'm sure we can then agree that I started saving from the first month?

Now take into consideration that diesel service intervals are shorter, more expensive than a petrol service and that the diesel costs more to purchase initially. It's not all just about fuel consumption.

 

[PsYTraNc3]

Now take into consideration that diesel service intervals are shorter, more expensive than a petrol service and that the diesel costs more to purchase initially. It's not all just about fuel consumption.

15000km for both
Added in a previous post that times have changed and there is not a major difference in service and maintenance costs anymore.

I've added that the cost of the car, service and maintenance plan adds up to R200pm more than the petrol and then save R600pm on fuel