Kohler Engine Oil and Filters

Kohler Pro 300-hour, extended life synthetic oil and filter provides unmatched protection for Walker Mowers equipped with Kohler engines. This 10W-50 fully-synthetic oil has a 3x longer life extending oil changes while providing ideal engine protection in all-seasons and all-temperatures.

  • 3X longer oil change interval
  • Engineered by Amsoil exclusively for Kohler
  • Fully synthetic oil formulated specifically for extended oil change intervals in Kohler air-cooled engines
  • Guaranteed 300-hour oil change interval on most KOHLER® gas engines past, present, and future
  • 10W-50 viscosity for all season performance
  • Extra corrosion inhibitor for seasonal storage and multi-season use
  • Lower oil consumption than conventional oil
  • Warranty approved for KOHLER engines

kohler-oil-filters

Kohler PRO® 10W-50

  Kohler
PRO
Synthetic
10W-50
Conv.
Auto
Oil
(API-SN)
Guaranteed 300 hour oil change interval check mark negative x mark
Extra corrosion protection for seasonal storage check mark negative x mark
Multi-season operation check mark negative x mark
Superior performance for extreme cold and hot operation temperatures check mark negative x mark
Lower oil consumption check mark negative x mark

One Oil For ALL Seasons

  • Full synthetic base oil for superior lubrication with pre-determined properties
  • More durable fluid film than conventional oils for improved wear protection
  • Protects against deposit formation and viscosity increase
  • 10W-50 Viscosity Formulated for All-Season Performance
  • Full Operating Range From -20°F to 110°F
engine oil operating temperatures

Why KOHLER PRO Oil Filter?

  • Extended Life Oil Filter Required for 300-Hour Oil Change Interval
  • Premium Media Selected to Provide Extra Capacity With Superior Filtration
  • Robust Construction for Longer Life
  • 10-Micron Fiberglass Media Supported by Wire Backing
  • Metal End Caps
  • High Durability Anti-Drain Back Valve & Sealing Gasket
  • Made in USA
internal view of Kohler PRO oil filterExtended Life Filter (left), Standard Filter (right)

Save With Reduced Oil Changes

Kohler PRO 10W-50 Oil Change Interval

300 HOURS

pass mark pass mark oil change mark pass mark pass mark oil change mark
100
Hours
200
Hours
300
Hours
400
Hours
500
Hours
600
Hours
Opportunity to Eliminate 2 of Every 3 Oil Changes!
Conventional Auto Engine Oil Change Interval

100 HOURS

oil change mark oil change mark oil change mark oil change mark oil change mark oil change mark
100
Hours
200
Hours
300
Hours
400
Hours
500
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600
Hours

Service Information and Resources

Kohler PRO 300 Hour Oil Compatibility

Model (Engine) Compatibility
S14i (Command Pro ECH440 EFI) check mark
C19 (Command Pro CH620) check mark
C19i (Command Pro ECH630 EFI) check mark
T23 (Command Pro CH680) check mark
T27i (Command Pro ECH749 EFI) check mark
R21 (6600 SERIES KT620) check mark
B23 (Command Pro CH680) check mark
B27i (Command Pro ECH749 EFI) check mark
H27i (Command Pro ECH749 EFI) check mark

Disclaimers:

  • Kohler PRO oil can be used on older Kohler gas engines from the model families above.
  • Kohler PRO oil is not certified for Diesel engines (H24d)
  • Kohler PRO oil can be used with other non-Kohler gas engines, but with standard 100 hour oil change interval
  • No filter is required for splash lube engines (S14i ECH440 EFI)

Oil and Filter Ordering Info

Kohler SAE 10W-50 Oil 1 U.S. Quart (946 mL)

Kohler SAE 10W-50 Oil
1 U.S. Quart (946 mL)
Kohler P/N 25 357 72-S

Kohler PRO Oil Filter

Kohler PRO
Oil Filter
Kohler P/N 25 050 53-S

Kohler SAE 10W-50 Oil 5 U.S. Quart (4,730 mL)

Kohler SAE 10W-50 Oil
5 U.S. Quart (4,730 mL)
Kohler P/N 25 357 75-S

Kohler PRO Oil Change Kit 2 Quarts Oil + Oil Filter

Kohler PRO Oil Change Kit
2 Quarts Oil + Oil Filter
Kohler P/N 25 850 02-S

 

Engine Break-In Oil

The engine is serviced with Kohler PRO 10W-50 synthetic oil and a Kohler PRO filter from the factory. Both are rated for 300 hours. A break-in oil change is not required. The engine crankcase oil and the filter must be changed after every 300 hours of operation.

Checking Engine Crankcase Oil Level

Check the engine crankcase oil level before use and after each 8 hours of continuous operation.

IMPORTANT: The importance of checking and maintaining the proper crankcase oil level cannot be overemphasized. Check the oil level BEFORE EACH USE.

  1. Park the mower on a level surface with the engine stopped. Also, make sure the engine is cool and oil has had time to drain into the sump [allow at least five (5) minutes after stopping the engine].
    IMPORTANT: NEVER check or add oil with the engine running.
  2. Before removing the dipstick, clean the area around the dipstick to keep any dirt or debris out of the engine.
  3. Remove the dipstick, wipe off with a clean rag, then reinsert the dipstick into the tube and press all the way down.
  4. Remove the dipstick again and check the oil level on the dipstick. The oil level should be within the “Operating Range” on the dipstick (between the “L” mark and the “F” mark).
    IMPORTANT: DO NOT operate engine without a sufficient oil supply in the crankcase. DO NOT operate with the oil level below the “L” mark or above the “F” mark on the dipstick.
  5. If additional oil is needed, refer to the Specifications section of your operator's manual for proper crankcase lubricant. Fill up to, but not above, the “F” mark on the dipstick.
    IMPORTANT: DO NOT overfill the crankcase (oil above “F” mark) as this CAN result in engine overheating, loss of power, and possible engine damage.

Changing Engine Crankcase Oil and Filter

When using Kohler PRO 300 Hour Extended Life Synthetic Engine oil, change the engine crankcase oil and oil filter after every 300 hours.

NOTE: Kohler PRO oil and filter are not required, but recommended. If conventional oil and filters are used in the tractor, the oil must be changed after every 100 hours of operation, and the filter must be changed after every 200 hours. See the Specification section of your operator’s manual for details on which oil and filters are supported.

  1. Park the mower on a level surface with the engine stopped. The engine oil should be warm before draining. If not warm from operation, start the engine and run a few minutes to warm the oil.
  2. Before removing the dipstick, clean the area around it to keep any dirt or debris out of the engine.
  3. Remove the dipstick and open oil drain valve and drain the oil into a suitable container. Be sure to allow ample time for complete drainage.
  4. Before removing the oil filter, clean the area around the filter to keep dirt and debris out of the engine.
  5. Remove the old oil filter and wipe off the filter mounting surface on the engine.
  6. Apply a thin coating of clean oil to the rubber gasket on the replacement oil filter.
    IMPORTANT: Use ONLY oil filters from the engine manufacturer (Kohler 25-050-53-S). Aftermarket oil filters may not seal properly and/or may not have the correct pressure relief valve for proper lubrication.
  7. Install the new oil filter on the engine. Turn the filter clockwise until the rubber gasket contacts the sealing surface, then tighten an additional 3/4 to 1 turn.
  8. Close the oil drain valve and tighten until snug. Do not over-tighten.
  9. Fill the crankcase with new, clean oil. Kohler PRO 300 Hour Synthetic Engine Oil (SAE 10W-50) and filters are highly recommended. Refer to Crankcase Lubricant in the Specifications section of your operator's manual for other options. Fill up to, but not above, the “F” mark on the dipstick. Crankcase capacity is 2.0 quarts (1.9 liters) plus 1/2 pint (0.24 liters) for the new oil filter.
    IMPORTANT: Check the dipstick reading before adding the last 1/2 pint of oil and fill only to the “F” mark. DO NOT overfill the crankcase (oil above “F” mark) as this CAN result in engine overheating, loss of power, and possible engine damage.
  10. Start the engine and check for oil leaks around the oil filter. Stop the engine, recheck the oil level, and add oil if necessary. (When the engine is first operated with a new oil filter, the oil level will drop slightly as the filter is filled with oil.)