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Originally Posted by VIPER_SRT Our perspectives and experiences are different on leased cars. |
Yes, but that's fine, it doesn't make yours of mine better or worse, just different. Forums like these are about sharing different experiences and perspectives I think
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Originally Posted by VIPER_SRT I noticed many in my professional and personal circle who run their cars even when the car screams "Service Due Now"; excuses like didn't get appointment, didn't get time, will get it done next week! I don't wait to change the oil till its life is 100% done but at 20% of its remaining life. |
I'm not sure how you can tell a car screams "service due now".
If you owners manual stipulates an oil change at say, every 10.000 km and you change it at every 2.000km that is fine. But really, you are wasting your money. If it gives you piece of mind, by all means you should continue, but there is no technical reason to change out oil at 20% of the manufacturer recommended interval.
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Originally Posted by VIPER_SRT Thats the most important and basic engine maintenance one needs to do! |
Unfortunately that is a huge myth if not incorrect statement that is very persistent in car enthusiast communities. Oil changes are necessary obviously. But as long as you use an oil that complies with the manufacturer's recommendation you are good to go. If the oil change interval say 10.000 km and you overshoot by a couple of 1000s km it is really no problem. You will not be able to measure the effect of that in terms of wear and tear.
Providing you are using the correct oil the main factors determining wear and tear on an engine related to lubrication are:
- High revving and loading of an engine in which the oil hasn't reach normal operating temperature
- Low cooling water temperature (when start up cold and or a faulty thermostat)
- dirty oil filter
- dirty air filter
You will find many threads on this and other car forum on oil, but very few on filter. And with modern oil it is actually the filter that is the weakest link in the chain so to speak. In fact the recommended oil change interval is often more related to the oil filter then the oil as such. But on just about all cars, both are changed at the same frequency. A dirty oil filter has a much bigger impact on wear and tear then oil that is overdue. Also, filters get very little attention. People will easily shell out big bucks to pay the best oil money can buy and than also install a dirt cheap filter.
Also the air filter is relevant as a dirty air filter will immediately cause more problems for your oil filters, because that's where the dirt ends up!
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Originally Posted by VIPER_SRT I'm not talking about engine idling at signals but running the engine for more then 15-20 minutes to run the AC in summer & heater in winter when there's a significant wait time. |
Any modern properly maintained engine you can idle for as long as you like, that's what they are designed for. Millions of cars proof this very point every day sitting stuck in endless jams running their Acs.
Most Acs don't run in the winter as they tend to cut out at temperatures below +/- 4oC. Running your heater during the winter doesn't put any strain on the engine. All that happens is you divert the cooling water through the car's heater and you have a fan blowing. The one thing you might want to watch is the cooling water temperature. Modern diesels are notoriously efficient and when cold, really cold, they can take a long time to get to normal operating temperature. That's when excessive wear and tear occurs! By opening the heater you actually cause that to take longer!
I have been in a Volkswagen Diesel in Norway at -26oC and during long idle period we could actually see the cooling temperature dropping a bit. But that is only under extreme circumstances.
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Originally Posted by VIPER_SRT Looks like you and many on forums have figured out that engine idling/knocking is safe but hey... I'm old school. I'm no expert on engines nor did any research on longevity of engines based on idling them or using lower octane fuel than what the manufacturer recommends but I do believe that cars should be maintained as per or better than than what's recommended by manufacturer.. |
I never said that knocking is safe. I said
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Filling up with regular instead of Premium might not cause any damage (just about all modern engines have pretty sophisticated anti-knock sensors and system) at all, just a bit of loss of performance.
It it does, primarily through knocking I doubt you would make it to the end of lease period of 2-3 years.
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If knocking is controlled by the anti-knock systems there is no knocking, so its safe. If there is knocking you will see some problems pretty quickly.
Jeroen