I bought a daihatsu cuore 2009 Cx eco model..
I have been suggested by the total parco pump to use a 20w-50 oil for CNG engines.. I have used it for 3 changes till now but I came across pakwheels few days back and searched for a Better oil this month because I'm getting very very bad mileage on petrol... I use 30% on petrol and 70% on cng
CNG without AC gives 16km/kg
Petrol without AC gives 8.5-9km/l
Which is unbelievable...
Then I came across my cars owners manual recommendations found on the internet. It said 10w-40 is the recommended grade..
I checked the oil level today after 2700kms done from last oil change, it's level was 25% below from full. Means 0.75l is reduced..
Any suggestions on this problem?