My helpful son topped off my '98 with a quart of synthethic ATF. The other 4 quarts is normal 10W40 oil - do I have an immediate problem or can I wait for the next scheduled oil change about 2,000 miles from now?
My helpful son topped off my '98 mustang GT with a quart of synthetic ATF...the other 4 quarts is normal 10W-40 oil - - do I need to run to the station and get it changes or can I wait until I change it on schedule - about 2,000 miles from now?