I am new to this forum and have just purchased a 2000 Avalon, this car appeared not to have been well serviced of late and has done 275k.
I thought it was best to change oil and filters and used the recommended fully synthetic 5W 30.
Drove the car a couple of times and was ok, the next trip the oil light came on when idling but went out under acceleration, the next time I started vehicle the light would not go out, I changed the oil pressure switch hoping this was the problem but it was not.
A mechanic friend told me to Start the car without the oil pressure switch and I should expect quite an oil flow if it was ok, I did this and all that came out was a trickle.
So I am hoping that the problem might be the oil pickup in the sump has become blocked, or maybe the oil pressure switch gallery blocked?.
Has anybody had this same issue or any advice on problem.
Thanks in advance for any advice.