Quote:
Originally Posted by KillerBMotorsport
With EJs we'd just add an inline Tee and Ball Valve Drain so you could dump the oil cooler lines and heat exchanger easily. I'd still do that on the BRZ. It's only ~$20 and I'd rather not have ~20% of the old oil still in there.
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Interesting. I always thought it was a little odd to leave the used oil in the heat exchanger. I like this idea in theory. What are the real-world downsides?
1. cost (negligible)
2. more points of potential failure (not a huge concern if done right)
3. what else?
Why wouldn't someone do this? Is 20% old oil just not enough to have a real-world negative impact? I could see that argument, but it kind of just seems lazy to me at the same time. It's not like one intentionally leaves 20% old oil in when there isn't an aftermarket oil cooler added.