No, I did not see or hear anything too terrible. I hate using the snake oil fixes, with a few exceptions. One being Seafoam. You could try running it through the engine oil and see if it cleans the lifters and allows them to refill. I do warn that it comes with risk for high mileage cars as it can h...

Give it a week or two of light running to see if the lifter tick eases. It’s taken me this long to get top ends quiet.

98 s70 T5. Almost 280k miles. Lent to a friend. Only use synthetic oil. The car was 1000 miles away from an oil change when I got the call that something was wrong. No oil on the dip stick. Added 2 quarts- still nothing on the dip stick. Loud clicking after I filled to the max line on the dipstick....

Point of conversation, white blocks don't have rocker arms.
As suggested, running it at low rpm and lightly loaded may get the lifters to pump up again; a question to ask is where did the oil go, and why didn't the low oil pressure light announce itself ?

What oil are you running in the engine? If you are running 5W-30, you could try a 5W-40 which is an option for my 00 V70R. Maybe worth trying a high mileage oil and see if that helps.

Neil.

Careful with Seafoam, the secret ingredient is odorless kerosene. It will thin out whatever oil is in the engine. Clean oil and time may be the best hope.

MoVolvos, no, I did not figure out where the oil went but I think that being an older engine it’s burning it and my friend I lent The car to receive the car right after I had done my last oil change and he probably just never checked the oil until it ran really low, About 4000 miles. I’m gonna try ...