[QUOTE]
Quote:
Originally Posted by some_other_dave
You don't understand! He has already explained how all of the oil testing laboratories in the world are actually owned by the Evil Oil Companies, who dictate that any oil run for more than 100 miles is "worn out" and "must be replaced now".
And all of the people who have torn down an engine after finding high amounts of metals in the oil and seen how the bearings are wearing through? They're all lying, every single one of them.
|
Its to complicated, but the devil is sitting in the detail somewhere. If we talk about destroyed engines and bearings we need to know if these people have used the right approved oil, did their engines overheated, did they drive reclessly etc. If your engine overheats you need to change the oil immediately even if the oil is brand new.
If oil gets contaminated by external elements then logically thats not oil anymore. The labs are doing their job properly they are just saying that normally the oil contains this amount of elements and then when you test the old oil they say it is this much over the normal. Everything ends here with labs. Thats fine.
Analyze this; Did anybody ever saw a doucumentary testing two same engines one with normal oil change and the other one without oil change? Never! It is as simple as that. The best way is to test it yourself.
At the end it is not the oil that dictates the life of an engine, it is the way of driving. Cold starts, sudden acceleration while engine is still cold, wrong gear shift especially down shift on manual transmission e.g. from 4th to 3rd all the vehicle load speed will be transmitted on the transmission and engine bearings etc. On automatic transmission the down shift is completely different much lighter for the engine. Thats why engines with automatic transmission last much longer (here's another small detail to why automatic transmission engines last longer than manula transmission engines. Is it the oil or the way of driving!).