Oil Reduction. Opinion for Changing Oil Viscosity

ahmedfaraz79 (ahmedfaraz79) 2021-08-29 17:50:09 +0500 #1

Aoa Pakwheelers,

I have Corolla 2012 in Use but i am facing oil reduction issue with no smoke on cold start up/acceleration. Currently i am using zic oil 10W 40 in my car and the redution is approx 700-900ml after 3000kms. I have to topup approx 300ml after every 1000kms. Some one suggested me to shift from 10w 40 to 20w 50 Api SM as it is thicker.
So should i shift to thicker oil or stick on same viscosity. Also advise me that can i use API SN or Plus in my engine in this situation.
Help from senior pakwheelers is much appriciated.
@Xulfiqar
Thanks.

ifadey (Fawad) 2021-08-29 17:56:21 +0500 #2

Try cleaning PCV valve. It may fix the oil reduction issue.

ahmedfaraz79 (ahmedfaraz79) 2021-08-29 19:24:58 +0500 #3

Discussed with 2-3 Mechanics and they said that there is no issue of PVC valve.
@rajaatta

ahmedfaraz79 (ahmedfaraz79) 2021-10-19 13:25:39 +0500 #4

Cleaned PVC Valve but the issue remains still. Positive input is appriciated.

Thanks

VCheng (VCheng) 2021-10-19 21:28:37 +0500 #5

Take out the spark plugs and check them for oil burning. Then consider a compression and leakdown test.