x5 - how often need to change spark plugs if at all?

[X5SilverBeast]

Originally Posted by m5james

The 10-15k intervals aren't all that unrealistic considering the fluid capacity of the oil pans, using a quality oil and BMW filters. I've read countless posts of people sending their oil to Blackstone Labs to have it analyzed and still have life left in the oil. I personally follow the lights on the dash but I do it sooner than later, meaning like 2 or 1 green left instead of waiting till it's yellow or red.

My highest mileage vehicle is a 90 S10 Blazer with 270k...transmission serviced every 75k, oil changes every 5k at the local Jiffy Lube for a measily $10-$15, which is cheaper and quicker than me doing it myself. The M5 has 198k, 740iL has 136k and X5 has 109k...Mobil 1 oils and BMW filters everytime.

I completely agree about the trans fluid, that was a bad call on BMW's part...50k on average for me.

It is finally great to see someone else that does take pride in their car maint. Well done on the m5 with 198k, that is outstanding. I wish every car owner would be like this. It is amazing how far vehicles will last when you stay on top of taking care of them. If everyone took care of the maint. like this, you probably wouldn't have to worry about getting a PPI done when buying(although I do recommend for piece of mind). Keep up the great work.

I get what you are saying as far as fluid capacity. I was blown away when I bought the 540 and seen it holds 8qts and the X at 8.5qts. Wasn't used to buying so much oil at once.