WHAT MOTOR OIL TO USE IN A 2000 BMW 740IL, WITH 90,000 MILES?

synethetic or regular oil? I also heard that bmw's have to use special oil.WHAT MOTOR OIL TO USE IN A 2000 BMW 740IL, WITH 90,000 MILES?
I would use a synthetic type of oil, maybe Castro GTX high milage?WHAT MOTOR OIL TO USE IN A 2000 BMW 740IL, WITH 90,000 MILES?
There is a branded BMW oil available from the dealer which started coming out around 97. It is a high quality synthetic. You do not void warranties using another oil, but you will get best results form better brands. The thing to be looking for is what was the base stock used by the manufacturer. Synthetics that use polyalphaolefin (PAO) as a base hold up better than some of the newer products that just add more refining to a petroleum base. Mobil One and Amsoil are about the best when tested by several sources, and you will find a lot of information on the web about this. Also with extended life filters, you get to go much farther between changes, which actually makes the cost about the same. I have a 98 740iL and a 92 525i, Both on Amsoil. A special note to those who drive with turbos, diesel or gasser, The high temperatures found in your turbocharger can burn most dino oil to carbon powder in hard use. Carbon is harder than steel, and certainly harder than those bronze or alloy bushings that let the little fan spin. But my 92 Dodge 2500 has over 300,000 miles and is still turning the factory turbo. (original long block too!) Make your choice based on how long you want to keep the vehicle.
Oh goodie another oil question I can get everyone riled up again with. First the claims synthetic oil will protect better, increase an engines lifespan is all bogus. HOWEVER if the car has variable cam adjustment that uses oil to drive the mechanisms that actually change the timing AND or if the car is a turbo car synthetic is recommend BUT does NOT protect better. BUT (again) if the car is turboed THEN synthetic will protect better since synthetic does not ';gum'; up at very high temperatures like around a hot turbo. When the oil gums up it causes ';hardening of the arteries'; restricting and eventually blocking off oil supply to the turbos bearings.


Using regular oil in a car that has variable timing but not a turbo will not hurt the car but it will cause a lag in performance since the valve timing change tends to be slower using regular oil.


VERY rarely do you see everyday cars that run so hot it needs synthetic oil. Only overheating and severe abuse does synthetic protect better in ';normal'; cars. AGAIN turbos and cam advance being the exception. BUT I have to say some cars have oil pan sludge problems by poor design and some say synthetic can help stop this. BUT this idea is not yet proven.


Since your car has variable cam its good to use synthetic but not ';required'; and its probably out of warranty anyways.
Its recommended to use Synthetic oil on those engines
synthetic. the oil bmw has is a synthetic, and you can use an off brand without hurting the car