Quote Originally Posted by mazyred1 View Post
nagpachange oil ako kanina sa speedyfix... RP 5w30 ang nilagay.. okey lng ba yung viscosity for mazda3 05 model .. 56k mileage?
hi mazyred, IMHO lang po.. Im using the same RP 5w30, it gave me less fuel consumption

not an expert but as I have read regarding viscosity, 5W30 is quite 'malabnaw' so it gives the engine less stress dahil nga sa malabnaw yung oil.

next is dahil din malabnaw yung oil, mabilis siya mag 'heat-up' (hindi po overheat ha?) yung mag init lang... mabilis din mag cool down. (sa pagkaka-intindi ko sa mga nag e-explain sakin.)

one na-point out sakin is- do be carefull using these kinds of visccosity type of oils if the engine is quite old.. because it can seep out of the gaskets. (malabnaw nga daw po kasi siya)

it was my 15k change oil so medjo confident pa ko na intact pa yung seals ko.

best is observe your engine fc, temp, and oil guage or if may oil na tumutulo. (which Im also observing for the past 3 months now)

but don't take it from me. not an expert po.. just passing on what I have read and experienced up to now.