Fuel Consumption is 5km/liter

**bail** · September 24th, 2017 05:30 PM

Originally Posted by monty_GTV

maybe its the other way around. baka gumanda hatak ng makina since manipis oil na ginamit kaya naging mas aggressive driving style ni TS at tumaas fc

seriously, TS just get back to the old oil and spark plugs. using thinner viscosity oil may not be that good to a 20 year old engine seals..

natawa ako dito may point ka nga sir kasi gumanda nga talaga yung hatak nung pinalitan ko to a thinner oil. ano yung may not be that good to my engine pag thinner oil? ano mangyayari? So change back to old oil kahit pangit ang hatak nun?

**monty_GTV** · September 24th, 2017 05:42 PM

Originally Posted by bail

natawa ako dito may point ka nga sir kasi gumanda nga talaga yung hatak nung pinalitan ko to a thinner oil. ano yung may not be that good to my engine pag thinner oil? ano mangyayari? So change back to old oil kahit pangit ang hatak nun?

since gumanda hatak, na-enjoy mo umapak sa gas pedal so your usual driving style and fc changes too

kung old na engine, old na rin mga oil seals. it's a common notion na when you use thinner viscosity oil may tendency magkaleak sa mga oil seals.

**bail** · September 24th, 2017 05:49 PM

Originally Posted by Wishing

Check mo dipstick kung nababawasan ng langis or check mo tambutso kung meron na kaunting usok lali na pag dinidiinan yung gas pedal. Pag positive pareho ang dahilan nyan ay yung paggamit mo ng manipis na langis. Dahil medyo luma na, maluwag na yung mga piston ring at sumusuot na yung langis sa compression chamber. Kasama na sya nasusunog dun at hindi na tuloy maganda and air-fuel mixture kaya mababa na efficiency ng makina.

yung oil ang nabawasan and may konting leak around sa valve cover gasket. dati nung nasa 20w50 ang oil wala siyang leak.

**bail** · September 24th, 2017 05:52 PM

Originally Posted by monty_GTV

since gumanda hatak, na-enjoy mo umapak sa gas pedal so your usual driving style and fc changes too

kung old na engine, old na rin mga oil seals. it's a common notion na when you use thinner viscosity oil may tendency magkaleak sa mga oil seals.

actually kakapalit ko lang din ng camshaft and crank shaft oil seals and also yung seals around the spark plug. So mas ok bumalik na lang sa 20w50?

**monty_GTV** · September 24th, 2017 06:00 PM

Originally Posted by bail

actually kakapalit ko lang din ng camshaft and crank shaft oil seals and also yung seals around the spark plug. So mas ok bumalik na lang sa 20w50?

i see, no worries pala at bago mga seals. if you are not comfy sa FC now then you can go back to your old oil in your next oil change.

**weisshorn** · September 24th, 2017 06:52 PM

Tama ba ang specs ng spark plug na kinabit?

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**ice15** · September 24th, 2017 07:07 PM

I'm guessing timing ang may problema.

Pacheck mo sa service centre na kaya mag check/adjust ng ignition.

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**mina_nuka** · September 24th, 2017 08:00 PM

Originally Posted by bail

Na observe ko after changing my oil from 20w50 to 10w40 and also from bosch platinum spark plugs to OEM spark plugs, fuel consumption ko naging 5km/liter na lang. bago din naman ang air filter. car is 1997 corolla 1.6 gli with 123k mileage. Ano kaya ang problem?

With that mileage, the timing belt should have been replaced already. If it was not, chances are the timing belt has stretched causing late valve timing or the timing belt has skipped a tooth or two. Verify correct cam timing using a vacuum gauge. The vacuum should be between 17-21 in.Hg. preferably around 21 in.Hg at idle speed.

There is a possibility that the exhaust is partially restricted. The exhaust back pressure should not exceed 1psig measured at the oxygen sensor mounting.