I HV recently installed new engine1KRFE which is doing great ..the car has almost done 1400 Kms after engine swapped ..it's doing great ..the mechanic used havoline formula 10w30 oil and asked me to use the same in future as well with drain interval at 3km but asked to do first oil change at around 1200 km ..the oil range on dipstick is same as on first day and no drainage..should I use same oil or should I switch to 5w30 full synthetic oil
The car is giving AVG to 16.2/ litre on local .. haven't gone on long route
