I brought my car in for a brake flush, to have the brakes checked , because the check engine light kept coming on,& because the car was shuddering/shuddering a lot. Also my driver. Seat would go forward & back but it was stuck in the down position & wouldn’t go up.. the brakes were replaced all around. They said they thought the shuddering & the intermittent engine light were caused by low oil level. Since I wasn’t due to have an oil change for a few months, they suggested doing an oil consumption test & explained how it worked. They also said they would need to order parts to fix the seat.