06 Acura RSX Base 2.0L with 32k miles - out dealer 5w-20 mineral with acura filter, in M1 EP 5w-30 and acura filter. Planned interval 6k. Next change: Pennzoil Ultra 5w-30 with M1 filter. Planned interval 6k.
02 Grand Am (2.2 ecotec with 106k miles) - out M1 0W-40 with supertech filter, in M1 10W-30 High Mileage with supertech filter. Planned interval 5-6k. Next change: Pennzoil Ultra 10w-30 with supertech filter. Planned interval 6k.
Parent's car:
09 Toyota Matrix 1.8 engine with 6k miles. Out M1 0W-30 with toyota filter (5k miles). In M1 5w-30 with toyota filter. Planned interval 6-7k miles. Next change - unknown. Possibly Pennzoil Ultra if I'm able to find any more in 5w-30 at reasonable price or Castrol Edge in 5w-30.
Sister's car:
09 Mazda 6 2.5L engine 42k miles. Out dealer's filled unknown mineral oil and filter. In M1 5W-30 with M1 filter. Planned interval 6-7k miles. Next change - possibly the same or Pennzoil Ultra or Castrol Edge in 5w-30.