salam guys my cultus 2004 model has started redusing oil and giving black smoke at start. this problem is started since i am running car on petrol in two months ago. Can some body tell me what is problem??
well there could be lot of reasons..might be rings are gone...if its fine on cng then get its timing checked by timing gun and also carburator needs to be cleaned.
Clean the pcv valve!
Remove the spark plugs. If they are oily u got problem with rings / piston. Not all cylinders may be oiling up. So do not mix the plugs when u remove them so that u know which cylinder has the problem.
And considering black smoke. It's probably problem with rings.
if its black smoke and not blu then your car is probably running rich on fuel.get the carb serviced