Ok I just got a VX last month and I really love it but I bought it with very high mileage and it needs a bit of work- I know that the previous owner just used regular oil... I am wondering if it is worth it to switch to synthetic at this point. I am ask because I heard that unless a vehicle owner used synth from the start, then the bennifits of using the synthetic oil wont be attainable.

What do you guys think?

p.s. I just hit 140k and I would like it to go another 140k