To all the oil expert here
From previous oil change there's a quart of 3100 left and I bought a gallon of 7100 recently. Should I use mix them together for the incoming oil change or just leave the 3100 completely? I will be changing the oil filter this time too
From previous oil change there's a quart of 3100 left and I bought a gallon of 7100 recently. Should I use mix them together for the incoming oil change or just leave the 3100 completely? I will be changing the oil filter this time too