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SO heres the deal. i have a 94TT at stage IV. It has ~59K miles and runs great. The previous owner ran regular oil and so i continued using regular oil. I have been considering switching, but i have heard many horror stories of engines starting to leak after switching to synthetic. (not sure if this is just a myth) I do not want that to happen obviously to my Z. i change the oil about every 1000-1500 right now. It does not seem that i am burning any oil. i get about the same amount out of the engine as i put in. So, should i switch to synthetic on the next oil change? Next issue is mid pipes/test pipes. I have stock pre-cats that have not been gutted. I do not want to spend the money to drop the tranny to install downpipes, and i have heard that gutting the precats while on the car is dangerous for the turbos. so if i want to keep the precats the way they are, would i benefit any HP from installing test pipes or mid pipes or would it not add any power? Thanks in advance.
-Ketan
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