Originally Posted By: OneEyeJack
Originally Posted By: Merkava_4
OneEyeJack - are you saying that the particles that are too small to be trapped by the filter are what contributes to the oil getting darker ? Are those same particles dirt particles, or are they combustion byproduct particles ?
Yes, and yes and some additives get darker as well. A PCV system can contribute as well.
You should not let the oil get too dark if your car employees a chrome muffler bearing with digital framus matter seals on the isotonic pre-lubrication fittings.
If you use standard chrome muffler bearing you don't have to worry. Your OLM will be calibrated correctly. If you do have to replace those chrome muffler bearings here is a video to explain what you have to do. Even if you don't tackle the job yourself you will at least know what your mechanic is doing. Just make sure he is BFD certified.
If I have a dual exhaust system, do I need two of those?
ROD