[tehdwarvenn]

so without thinking yesterday.. i grabbed the wrong oil. i usually get conventional 10w 30 and i grabbed the mobil1 that was on sale which was fully synthetic 5w 30.


after letting the car sit overnight, (i park it in first gear, i live on a hill, because i have no parking brake) it was halfway out the road in the morning.

after starting it, theres alot of noise coming from the valvetrain (tapping, and noise!)

so what im asking iss.... will replacing the springs and cam (which im doing this upcoming weekend) fix the problem?

how bad exactly is this for the car? i know alot of things are loosened up now, and what exactly is the tapping anyways? is it against the pushrod or valve cover, etc.

[nolife]

Changing types of oil or weight from 10w-30 to 5w-30 is not going to cause the problems you are describing. I've mixed and used every type of synthetic and regular oil in my 91 Mustang at random for the last 17 years. Maybe you do not have enough or your filter is jacked up or blocked or maybe it is just taking a little bit longer to get the filter full and get the pressure built up because of the hill.

[tehdwarvenn]

soo i should change the filter? its a mobil1 filter, thought it would go hand in hand with the mobil1 "quality" so i guess ill get a motocraft

[91cobra5.0]

my question is how would your engine oil effect your car that rolled IN gear out into the street, sounds like a trany problem unless u parked facing down hill in first gear which would make no sense.... and u should really use the turn your wheels into the curb trick so that it doesnt roll ne were even if your trany goes out

[86_Notch]

i tried 5w 30 in a car of mine once and my valve train tapped like you are describing , i drained it out and replaced it with the usual 10w 30 and the tapping was gone

[tehdwarvenn]

well lets use common sense. parking car on hill for a year with no roll on 10w 30... use 5w 30 and the next morning it rolled down, i dont think thats a tranny problem. i figure the cyl walls must be VERY lubed with some good low vis. oil. haha.

its fine. not a big deal. it only makes tapping noise for the first 8-14secs or so. ill take a video and record the sound if you want. its pretty nasty sounding (in a bad way)

why i worried so much was when i started in the morning and hearing that noise for the first time, and not driving it around, so i didnt know it would stop very quickly. just panic'd i guess

[nolife]

Originally Posted by tehdwarvenn soo i should change the filter? its a mobil1 filter, thought it would go hand in hand with the mobil1 "quality" so i guess ill get a motocraft

If it happens every time you start the car, I would do something. Oil filters have an anti-drain back valve that is supposed to keep oil in the filter and prevent it from draining back into the pan. If there is oil in the filter, oil will start flowing a lot quicker when you start the car, if there is no oil in the filter, it takes some time. I would never have thought 5w-30 would cause valve noise on startup when 10W-30 did not but 86_notch showed otherwise. Take your pick, try a new filter or try new oil

I have a small car that makes some bad valve noise about once in every 20 or so starts for about a year now and I doubt it is the oil or filter.

[78mach1]

i wouldnt run 5w-30 in it anyway, just get your self a good 10w-30 and change it out

i would say the oil was your problem.

[Chris951]

I run 5w-30 mobil 1 in all of my cars. No problems here.