The Gear Oil Change Schedule Calculator estimates a general arithmetic estimate for your scenario from the quantities, rates, period, units and other assumptions requested on the page. Replace the example values with your own gear oil change schedule figures and recalculate after changing an assumption. Use it to compare scenarios, then verify any current rate or fee before acting.
Calculate gear oil change schedules by gearbox type and mileage, with estimated annual costs.
Schedule next change
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kilometres
Distance remaining
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About a month left.
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Cost per year (average)
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Gear oil status.
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Gear oil and the importance of transmission.
Gear oil lubricates and dissipates heat from the gearbox parts. Regular replacements extend the life of gears, which are expensive to repair, especially automatic and CVT gearboxes, which can cost thousands to hundreds of thousands of baht.
Gear oil change intervals by type
Manual gear: every 50,000 km
Automatic gearbox: every 40,000 km.
CVT: every 40,000 km (using type-specific CVTF)
DCT: every 40,000 km (use type-specific DCF)
The consequences of neglecting to change gear oil.
The deteriorated gear oil loses its lubricant properties, causes corrosion of metal parts, increases heat accumulation in the gear system and may lead to complete gear system failure. A few thousand baht of regular gear oil change can prevent gear repair costs of up to 50,000-150,000 baht.
Frequently asked questions
Automatic gear oil should be changed every how many kilometers?
Automatic transmission oil (ATF) should be changed every 40,000 km. For driving in hot cities, some manufacturers may specify 60,000–80,000 km. But in hot Thai climate and heavy city driving, it is recommended to change at 40,000 km. To extend the life of automatic transmission which is very expensive repair.
CVT and automatic gearboxes use the same gear oil?
No CVT (Continuously Variable Transmission) requires special gear oil for CVT, specifically, can not be replaced by general ATF. Using the wrong gear oil will cause severe damage to CVT gear. Always refer to the type of gear oil recommended by the manufacturer in the car manual.
What are the signs of deteriorated gear oil?
Symptoms to be wary of include gears that are shaky or gearshifts that are not smooth, gears that are slippery or do not grip, gear oil that is black or smells burnt (usually it should be bright red), the car is slower than it should be, and abnormal noise from the gearbox. You should have a mechanic check immediately if you notice these symptoms.
What special care does the DCT gearbox need?
DCT gearboxes require a special DCF gear oil and should be changed every 40,000 km DCT has a wet clutch that needs proper lubrication Driving in traffic can cause gear oil to deteriorate quickly, especially during the frequent releases when the clutch works hard.
Check before using results
Summary before deciding
This calculation result is suitable for preliminary planning. Actual figures should be checked from documents or official sources before making important decisions.
The calculation is based on the information you enter on this page.
Special cases may require additional information.
It is recommended to record or compare the results with the related tools below.
Disclaimer: The calculations are only general estimates. For precise changes, refer to the manufacturer's manual. Only gear oil of the type recommended by the manufacturer should be used.
English calculator guide
How to use the Gear Oil Change Schedule Calculator
Use this page to test a specific gear oil change schedule scenario. Enter your own values in the calculator above, review the units beside each field, and recalculate after changing an assumption. The result updates the gear oil change schedule estimate instead of relying on a generic example.
Build a baseline gear oil change schedule case with figures that match your situation.
Run a second gear oil change schedule case after changing the rate, period, quantity or other key assumption.
Record the difference between the two gear oil change schedule results and the input responsible for it.
Inputs for the gear oil change schedule estimate
For this gear oil change schedule calculation, check the quantities, rates, period, units and other assumptions requested on the page. The result is designed to show a general arithmetic estimate for your scenario, not a guaranteed provider price or official decision.
How the gear oil change schedule result is calculated
The calculator applies the displayed inputs to the stated arithmetic relationship. Reusing the same gear oil change schedule inputs will produce the same estimate, which makes the page suitable for controlled scenario comparisons.
Checks for a gear oil change schedule decision
Confirm any current rate, threshold or provider rule that could change the final amount. For gear oil change schedule, Use the result as a planning estimate and confirm any rate, rule or threshold that may have changed before acting. Recheck the entered values and units if the result looks unexpected.
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