5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
Our 2002 525 finally got into the yellow zone indicating the time for an oil change. Got to it this weekend and after changing the oil with Mobil 1 5-30 synthetic I used the trip odometer method to reset the LED indicators on the dash. Worked really well and was very easy. I was very surprised to find the mileage on the oil when using the on board oil computer. Almost 9,000 miles since the last oil change. How times have changed since the old days of every 3,000 miles
I know I may get criticism for this but I owned an 85 Pontiac Fiero for a while and when purchased I completly built the motor. .60 over 11.5:1 comp ratio solid lifters custom cam and all the porting, gasket matching and balancing you could imagine. needless to say I doubled the output of the motor. I ran Amsoil in that engine and went 15k between changes. I did however change the Mobil-1 filter at 5k and 10k. I noticed only slight discoloration of the oil and very little "breakdown" even after 15k. Oil has different properties when you get into the higher grade stuff like Amsoil and Royal Purple. The new Castrol edge seems promising but I haven't been able to to do any real world tests to prove its merit. Like all things you get what you pay for.
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