Quote Originally Posted by ReggieMar View Post
I'll try to change premium gasoline muna before going to a mechanic, ayaw ko kasi yung kung ano ano sinasabi ng mechanic na problema sa vios in the end hindi naman ma reresolved. atleast here my mga option to try. maraming salamat po sa mga inputs nyo.
the gasoline you are using whether it is the premium or ordinary is not an issue unless you are filling up from an old gas station with dirty fuels. The viscosity of your engine oil is also not an issue with regards to your engine jerking, however, it does have an effect on your fuel consumption. What is the mileage of your car sir? These are the ff that you should check:

1. Change your fuel filters (pref with OEM) if your car mileage is more than 40k km. as such change it every 40k km
2. Did you already change your clutch system? if yes, you may have placed non-OEM parts and are the ones causing the jerking. if however, you did not yet change it and probably the clutch disc has already thinned out and the rivets are catching on the flywheel causing also jerking. But is your clutch slipping already?
3. Did you have your engine and transmission mounts checked? if your car is high mileage, there might be one or two that has seen better days and needs changing (by experience with different cars, OEM hands down is the way to go here. No questions asked)
4. Is your engine with COP (coil-on-plug) ignition? If so, check them one by one and change the one that is failing
5. Check also if your sparkplugs are still ok. or if it is new, is it the one recommended in your manual?
6. Check also your body mounts
7. check also your front brake calipers. Is it sticking or stuck already? it might need servicing or replacing if the piston or cylinder is pitted...

good luck!