Quote:
Originally Posted by lkchris
The new transmission fluid change recommendation is one time only at 39-40K miles.
It's a negative to change coolant more often, as this loses the chemicals added to make it last 15 years in the first place.
Oil changes are every 10-13K miles and those are VERY conservative numbers, as the changes are maybe 20K miles in Europe. America is chock full of oil change geniuses, and typically American distribution arms of German companies reduce the intervals for "political" reasons.
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Perhaps yes with the new extended coolant the newer cars have, very true.
However, trans fluid should still be changed every 40k....not just once....I do it 2x as often as that....once a year.
Perhaps the modern engines with their super fleece filters and ultra-clean operation can get away with 10-20k oil changes, but a 617 would have partially solidified oil by 10k if you didn't change it.

Way too much soot. I never go much over 4k on those......oil gets dirty, better to change it. I don't believe in the 10k+ stuff.....highest I'd go is maybe 7-8k on a newer engine....and that's barely 1-2x a year with the amount I drive, especially with more than one car.
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