bb1-man said:
awesome write up silvia. But what about older engines? do u still recommend full synthetic for older turbo engines? im running an 8 yr old 4g63t and ive heard some ppl recommend using semi-syn instead.
and if using full-syn with turbo engine, can we still stretch the next oil change to 10,000 km?
Some ppl will say, old engine should used mineral or semi synthetic, but not full synthetic, but some say no problem, bcos mineral & synthetic is compatible.
http://www.imakenews.com/rotella/e_article000398800.cfm?x=b57g4m6,b2lKnS5l,w
As far as i know, synthetic is compatible with old engine as well, for certain group of ppl fhaving some problem when switch from mineral or to full synthetic for their old / high milleage engine is bcos of the additive in the full synthetic help to clean up the engine, when it wash away those "dust" it get block some where, so they feel some thing wrong with the full sythetic oil & start blame on it, this can be over come & get more better result after 2 or 3 oil change.
put it this way, if old engine using synthetic will cos harm to it, then what happend if you using mineral or semi oil, under harsh running with high temperature, the oil viscosity break down & burn your bearing....which 1 is more serious, no joke when it comes to burn bearing & damage your engine? Again, if your car didnt mod too much & not always pushing it to the limit, semi synthetic will do the job also. Every catergory of oil will will have it advantages & disadvantages. Like what B18C-R say, at the end, you are the 1 choosing the oil depens on your liking
Is not recommended to change oil up to 10K in our turbo charge engine...again, all is depends on your driving attitude & what oil filter u are using. :_: