So my wife told me last night that her dad told her something but didn't want me to feel bad. I changed his oil in his 97 Nissan hard body a few months ago and apparently something happened to it...I wasn't supposed to know so I can't really ask. Whatever shop he had it fixed at told him it was because the oil was overfull. Granted I didn't know these engines only take like 3.5 qts so after I changed it and checked the dipstick, it was 1 quart over, so I drained some out, and let it ride. It was only about 1/2 qt over and it had a few leaks so i figured it would be no big deal. So is there anything that could happen if this engine were 1/2 qt to 1 qt overfull?