Quote Originally Posted by zoopsta
hey guys,

just a noob question, ive been getting mixed reponses for this one.

my lude vti-r has been serviced religiously at a honda dealership (prior owner) and now its time for me to change the oil (its got nearly 165k)

I bought Castrol Formula R Synthetic 0-40w

Do i have to do a flush before i change to the synthetic? Or would it be alright to switch over and change after say 5000-10000kms?
flush with what? no product i know of can "prepare" your engine for a different type of oil?

my VTiR teg had 155'000km on it and i switched straight to castrol Formula R as soon as i bought it...

i did not notice any problems after doing so. the B20VTEC engine i just installed in my VTiR has been running on mineral oil since i built it and i am switching straight over to Mobil 1 full synth this weekend...(i highly doubt there will be ANY problems with this as the seals are all brand new and have net set with a particular type of oil)

as this Penrite fact sheet states:
http://www.penrite.com.au/techbullet..._SYNTHETIC.pdf

When changing from any oil type to the other the possibility of short term oil consumption may arise - regardless of the type of base oil.
and finishes with:

In all cases, the old oil should be fully drained and the filters replaced when changing one oil to another, even within brands.
i dunno about you, but i always change my filter when i change my oil, they are only like 8 bucks or so...

and since your car is newish, it will have less problems than say a 1984 Ford Telstar in changing over oil type, IMO...