so my vehicle has a rear main or oil pan area leak and the labor is just gonna be $1000 to fix it so i dont want to spend that much. its a truck with a 6.0l v8, i just drive in the city and highywa, nothing extreme.the oil capacity is 6 quarts for my engine. so ive had this slight rear main leak or oil pan leak for like 1-2 yhears so far and for the longest time it just drip when i parked the vehicle etc but it would never drip too much. like for example at my oil change i would be full and then 6000km later i would be in the middle or at the lower part of the hashmarks which is still fine but now its summer and maybe this accelerated the leak but i got a message on my dash saying check oil level and i did and it was low, so i added 1 quart and now its in the middle of the dipstick. i obvs want to keep it high as possible but i am wondering how low would i have to be to notice or experience effects of the low oil? would it have to be like more then 1+ quart? i will be switching to a hm oil soon to see if it helps thanks!