Quote:
Originally posted by MTU 50
I have also heard that if you use synthetic for a certain amount of time, then you should not switch back. However, I don't have any scientific evidence to support that either, but if I find some, I will post it.
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I would have to concur with that, as well. I was always taught (by who, I'm not sure) that it was not advisable to switch to synthetic in an engine with 50k or more conventional oil miles, but I have heard many real life examples that defy that.
Take care,
-Chris