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Most oils have proprietary additives.Mineral based oils contain sulphates that can be damaging to "yellow metals" i.e. copper and brass etc...(an issue with gearboxes) Synthetic oils generally do not.Follow vehicle makers specifications.


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From what I read everything you do is admirable.So far not addressed is tyre pressure. Correct pressure = lower mpg. and no overheating(of tyres) issues


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Synthetic based oils do not typically contain sulphanates. Mobil, as an example recommend Mobil 1 synthetic gear oil in lieu of a GL-5 lubricant that does contain sulphur and as you correctly state is injurious to copper, brass, and the like.


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This is normal behavior - When the engine is not running, there is no oil pressure, so when the ignition is turned on, that light will be on. As Larry says, this functions as a bulb test so that you know that it is working. When you start the engine, the oil is pumped round, the pressure goes up and the light goes out.


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Basically this is a bulb test. The CEL and Oil pressure light stay on until the engine is cranked. Air bag lights, ABS lights as well as others flash a certain number of times or stay on for a few seconds then turn off. This is normal operation for those lights.


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I cannot think of any car that does not illuminate the engine/oil symbols when the key is in the ON position with the engine off. It is perfectly normal.


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Most servo attendants will offer to check your oil when engine is hot.Some will even show you the dipstick to validate claim engine needs oil.Oldest trick in book to sell you more oil.It is then overfull causing a smoky exhaust.Always check on level ground when cold to give accurate reading.Conversely auto-trans fluid should be checked on level ground in ...


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much like motor vehicles (depending on age) some makers recommend mineral based oils some synthetic.They do this for a reason as viscosity/additives vary.Use what they specify.Lubricant makers have websites,some of whom allow you to pose questions regarding lubricants and applications


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after topping off your oil park in a wind free environment o/night having laid down newspaper under car which may narrow down source of leak.Just to be sure lock garage to ensure the car is not being tampered with.Some folks find such things as fuel/oil tampering funny


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It sounds like you are getting drain back. When your engine sits without running for a period of time, most all of the oil in the oil passages drains back into the crank case. When you restart your engine, the oil has to be brought from the pan back up into the oil passages, then you see your oil pressure raise. Since I don't know which year your BMW is, I ...


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This vehicle in your example photo is a really good example for when not to use an oil drain valve. Notice the heavy lugs on the all terrain tires? I am not sure if this vehicle is 4 wheel drive, but the tires indicate it the owner plans on driving on other than smooth paved highways. A drain valve on an off road vehicle, is an invitation for a long walk ...


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I would suggest taking a look at the quality of the oil filter. The oil filter doesn't, strictly speaking, tell anything about the quality of the oil, but it does say something about the people/company who changed your oil. If they used a high-quality filter, then it's more likely that they used a high quality oil. Similarly, if they used a low-quality ...



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