Originally Posted By: alcyon
Originally Posted By: zeng
Originally Posted By: Jetronic
a 40 weight multigrade minimum according to the manual.
Hmm ....... IIRC this Mitsubishi 4G13 engine specifies xW-
30 API SG.
hey..nice to see some one from the same country over here instead of low yat forums. Here is the oil chart. Not sure what is sW-40 though..must be a typo. Is the S actually 5 ? As you can see a 10w30 is only good up to 36 c? So what happens in worst case malaysian jams when the car isnt moving and there is no airflow to the radiator..only depending on the electric fan to dissipate the heat.
Thanks for sharing.
My pdf file shows Mitsubishi 4G13 engines requires API SG (API intro in 1989) :
a) 10W-30 for ambients between -30C to 40C (instead of 36C in your file)
b) 10W-40 or 10W-50 for ambients between -30C to 50C;
c) 15W-40 or 15W-50 for ambients between -15C to 50C; and
d) 20W-40 or 20W-50 for ambients between -10C to 50C.
You have a valid basis in taking the position as per (d) above, by using 20W-50 , but you
probably pour in unsuitable SF rating , that was then commonly available in Malaysia till middle
or late 1990's (if I guess it correctly) when your engine requires SG rating and above.
Shell Helix 3 20W-50 SL is only newly available in 2015 , though API intro SL way back in 2001;
and until 2013, Helix 3 20W-50 SJ/SG (API intro in 1997/1989) was available in Malaysia.
However 10W-30 was used by factory warranty service in my case , and in early 1990's the same
10W-30 grade was recommended in most other contemporary Japanese engines from Toyota's and
Honda's etc.
Having said this, 15W-40 has been my choice......... for frequent 3000 -4500 rpm highway
driving ........... and for engine wear protection .
Btw 10W-30 and 15W-40 SG ratings were readily available in early 1990's , unlike grade 20W-50
SG.
http://www.shell.com.my/products-service...ineral/hx3.html