QUOTE(cempedaklife @ Sep 4 2019, 04:50 PM)
yes, try 5w40 one time jan till now. yes use seafoam one time only.
so that's why i say, definitely feel smooth, definitely switch back to 5w30 got effect on this feel.
and i just want to state i FEEL seems smoother than before i switch to 5w40, when still using 5w30.
i dont have any data, just feeling. and sharing what i FEEL. i didnt say seafoam definitely works
i dont mind doing this every 2 years.
and i wont be switching back to 5w40, will stick to 5w30 from now on.
i do have a bottle of 5w40 shell helix ultra left.
responsive, sure better, but most coz 5w40 back to 5w30 lor. cant say much about this and power. like you said, not gonna be very accurate coz of my scenario. i can only record my FEEL
and syukur no leaking after 1 week+ after change. its an 8 years old car.
do check out my blotter spot test:
https://forum.lowyat.net/topic/4192241?author=cempedaklifeand check out zeng's comment on it.
ohh...it's shell fully, i see
extra bottle shell just sell la, since you prefer thinner one
i feel that seafoam need to be used more often, maybe in other application than filling in crankcase, since your oil change probably is yearly once, i wanna suggest twice a year, might be too frequent for you
i plan to switch to use seafoam on intake twice a year and in petrol tank once in 2 months