Hello guys, starting to have a bit of a concern about my oil consumption on my 94 landcruiser. Vehicle has 212k on it now and it’s usual consumption is about 1 qt around 3-4K miles that’s with a rear main seal leak that I been putting off for some time now. Recently my brother decided to help me out by adding some oil after I noticed the low oil level light appear for a few moments on my to work that day. He added oil and forgot to put the oil cap on. My usual daily commute is about 44 miles to work and back, on the 3rd day driving to work the oil level light turned on and I thought that was weird, I got to work and open the hood to oil residue all over the valve cover/ intake area and hood insulation. I added Almost 2 qts of oil and replaced the oil cap that was sitting near the headlight. Over the past week I have added another 3 qts of oil and began to notice a oil burning odor during cold start but no visible smoke. Oil color on the dipstick also changed from yellow to black, usually my oil stays fairly clean even when I change the oil every 5k miles. I ordered a pcv valve and grommet and oil cap seal from the local dealer. Replaced the pcv and other parts on Friday along with a oil and filter change, made sure oil is topped off at the full mark. After less then 100 miles on my way home from work today I noticed the oil level light turn on again on a slight downhill. I haven’t checked the level yet but I’m concerned over this excessive consumption after something I thought would not even be a big deal. I also noticed while engine is operating temp and idling if I open the oil cap I get no change in rpm. Prior to this, opening the oil cap would cause the engine rpm to drop and engine will run rough for about 20 seconds until the idle air control adjusts. Makes me believe internal air/vacuum leaks. Sorry for the lengthy post but I’m wondering if anybody has experienced something similar. Thank you