Quote:
Originally Posted by edco
See, while intellectually I agree that it makes sense to replace "stuff" that wears or gets less effective over time, I want to think that the engineers at BMW didn't pull a number out of the air when it came to determining replacement intervals. Now if you live in a really dusty climate or 80% of your driving is bumper to bumper, or some other extreme environment, then those fellows in Bavaria may not have it down exactly.
But for those of us (and you can tell just by our mileage) that don't put a lot of "stress" on the engine and power train, I believe that the recommended service points are there for a reason, and mere mortals (like me) don't have any business re-designing their scientifically developed program.
No, I don't believe in Santa Claus or the Tooth Fairy...
I do believe in buying GOOD, PREMIUM gas though.. 
ed |
I agree. I change the oil, filters, brake fluid, coolant, etc when BMW recommends. However, I have not touched the trans fluid and am on the original plugs at 120,000 miles. I am going to do the plugs in the next few weeks, but our X still runs like a top. I only use 93 gas as well. I have to be honest, most people are not going to tell a difference in power between plugs changed at 30,000, 50,000 or 100,000 miles. The ones who say they did probably felt a difference because they knew they were changed, imo. I would guarantee that if I snuck into their garage and changed out their OE plugs with 50,000 miles, they would not notice. Unless there were other issues of course.