|
In Reply to: mobil 1 question posted by Alex on April 15, 2001 at 14:17:48:
Benefits of synthetic are:
1) Supeior flow at cold temps. Ever pour dino 20W50 below freezing? Looks more like pancake syrup. At 0F, Mobil 1 15W50 pours like it's 70 degress outside.
2) Greater stability at high temps. Resists evaporation and coking (turning to carbon and varnish) when the engine temps creep up and during hard use.
3) Thinner, yet it lubricates better. It takes less power to pump it, so that's less strain on the oil pump chain. You also get a tiny bit more power, but you probably won't notice. Maybe 2-5HP at high RPMs.
4) Approved for longer drain intervals in many fleets, including the US Military.
In my 535i I kept it in up to 8k miles, but that was a car with a recently rebuilt engine, no leaks, and all highway miles. The oil was abrely dark after 7k miles. If you typically change your oil every 3k miles or 3 months, you could probably leave synthetic in for 5k miles or more, depending on how the car is driven. If you alwayws drive the car until the engine and oil are up to temp, then your oil will last longer. Short trips that don't allow the oil to heat up will cause it to become acidic, and it may even collect slight amounts of water. Most oil companies and fleets will not change the oil until the TBI (total base index) drops below a certain point, provided the oil isn't burned, diluted with fuel, or otherwise contaminated. The "base" keeps the oil from becoming acidic. Once it's used up, it's time to change.
James
james_535@yahoo.com
88 M5
88 M3
i purchased my m5 about 3 weeks ago. I believe that the car has never gotten mobil 1. Any recomendations for this switch, what are the benefits if any. And what about the problem with the oil seeping through the seals.
alex
montoya@netside.net
© 1997 -
2008
Jump Internet Inc. All rights reserved.
