have you completed 1st service after delivery? which engine oil is used? OEM suggest 5W-30 or 0W-20 for the 1.8 2ZR-FE engine. anything above that and the engine performance will be affected.
if at 1st service by OEM they used 20W-50 they have screwed up. Revisit and pay for change of engine oil to 5W-30 or 0W-20 as owner. User manual of vehicle can be referred to and OEM 3S can not decline to change oil when you are paying for it.