someone gave you bad info, heres the service schedule for 150k, first i see the coolant mentioned.
240,000 Km (150,000 Miles)
Change engine oil and install a new oil filter.
Rotate tires and inspect for wear.
Inspect brake pads, shoes, rotors, drums, brake lines, hoses and parking brake system.
Inspect wheel ends for end play and noise.
Inspect engine cooling system and hoses.
Change Motorcraft Premium Gold coolant (see Exceptions To Normal Schedule and Mileage Base).
Inspect exhaust system and heat shields.
Inspect steering linkage, suspension and ball joints.
Inspect halfshafts, driveshaft and U-joints (if equipped).
Install a new fuel filter (not required for Fusion and Milan).
Install a new engine air filter (not required on Focus).
Check air filter restriction gauge, install a new air filter as necessary (Focus only).
Install a new cabin air filter (if equipped).
Change automatic transmission/transaxle fluid (except CVT transmission).
Change automatic transaxle filter (except CVT, Five Hundred and Montego equipped with a 6-speed automatic transaxle).
Change rear axle lubricant on all RWD vehicles.
Change rear axle fluid (Class A Motorhome).
Install a new accessory drive belt(s) (if a new belt has not been installed within the last 100,000 miles).
Install new climate controlled seat cushion filters (if equipped) (Navigator, Freestar, Monterey and Expedition).
Install a new climate controlled seat back filter (MKZ only).
Inspect PVC for flow (3V engines).
Lubricate steering linkage, suspension and ball joints (if equipped with zerk fittings).
Install new non-sealed RWD front wheel bearings and seals (if new bearings and seals have not been installed in the last 100,000 miles).
Lubricate the 4WD front axle shaft U-joints (if equipped) (F-250/350/450/550).
Change front axle lubricant (4WD only).
Change transfer case fluid (4WD only).
Change automatic transmission/transaxle fluid on all vehicles equipped with a 4F50N, 5R44E, 5R55E, 5R555, TorqShift (with externally mounted remote filter) and CD4E transmission/transaxle. Install a new remote filter if equipped with a TorqShift transmission. Inspect automatic transmission fluid level using the fluid level indicator on all other vehicles (if equipped with an underhood fluid level indicator). Change the in-line service-installed transmission fluid filter (if equipped).
Carry-out multi-point inspection (recommended).