yes i think that would be more practical, use cheaper oil and change it more often before it starts to oxidize and get acidic, leaving residues and sludge

also i think it wont be much good if using good oil that sustains longer but the normal filter still built to last way shorter

what i do is i just put a mindset and get used to "rm40 per liter oil is standard", at least for now haha

Yup, exactly. I want to remove the dirt if not sludge since still early. If kept longer may just turn to sludge....
I am using even cheaper then that at RM22 per L. Just got some at warehouse sales at RM70 per 4L....

---

Added on December 4, 2011, 8:51 pm
the w denotes winter, therefore 0w is even lighter then 5w, but both are not use in Malaysia weather as we never have winter here, therefore even if you have 10w-20, not much difference....

that is exactly my point of why oem recommends 10w30, it is cheaper and widely available to accomodate all range of users. i bet they would recommend 0w30 or 5w30 if everyone can get it off the petrol stations. i think prius is using 0w20 and its not a small engine, toyota recommended it to score Corporate Average Fuel Economy (CAFE) rating if im not mistaken since fuel economy is its main selling point

just pour in sr-1 5w20, im using it now for more than 3k with no oil loss and i think its going to stay that way. power and smoothness gain is highly noticeable compared to last royal purple 5w30

0w20 is in fact thinner than 5w20 if we closely compare the viscosities at 100 celcius. redline 0w20 - 8.2, redline 5w20 - 9.1, redline 10w30 - 10.7, redline 10w40 - 14.6, torco sr1 HPS 5w20 - 7.37 (thinnest i found so far)

from these figures, u can see the big difference between 10w30 and 5w20 and all w30 oil to 10w40 oil

i suggest redline for max engine cleanliness and performance, torco for high revving and long haul drive, amsoil for longer term oil drain. ive studied the spec and compound of these 3 oils hence the conclusion, other brands yet to be known

best combo i personally suggest would be amsoil with torco mpz - longer term drain from amsoil with insanely lots of moly from torco mpz