He isn’t at the North Pole. I would think at 60F there would be little to no difference between the two.0W will be thinner when cold.
He isn’t at the North Pole. I would think at 60F there would be little to no difference between the two.0W will be thinner when cold.
I would replace the filter with a new one. See if the noise goes away.My HEMI engine developed a nasty rattle at cold start-up. The rattle lasts for about 2 seconds.
I am hopeful this noise is caused by a faulty ADBV. The current filter is a Genuine Mopar MO-339 with 1600 miles on it. If I dissect this filter after removal, is there a way to confirm the faulty ADBV?
If it was not used and oily, you could do the ADBV "blow test".Don’t think there is any way to tell if faulty though ...
I don’t think this is an oil issue. The noise does not present itself during warm restarts.Maybe the 0W-20 is leaking down at the chain tensioner(s) or hydraulic lifters, even if the filter ADBV is working. You have two possible causes ... oil filter, or oil ... or maybe a combo of both.
How would a 0w be more viscous than a 5w? You're right though, I really don't think the difference would matter either way.When the oil cools back down to room temperature, 0W will a a bit more viscous then 5W ... but probably wouldn't matter.
Question for the OP is, how long does the engine have to sit to get the start-up noise? And does it now happen on every single cold start-up?
Not thinner but easier to pump, and it would have to be mighty cold for a 0w to out pump a 5w. Probably in the -20 to-30 range.0W will be thinner when cold.
One easy way is for one to be a 5W-20 and the other a 0W-40. But a serious answer is that it's completely temperature dependent. Above -30 or so it is quite possible for an oil with a lower winter rating to be thicker than one with a higher rating even within the same grade. It happens all the time when comparing ILSAC oils with certain European approvals, such as with the old green Castrol. One is not a "0 weight" and the other a "5 weight".How would a 0w be more viscous than a 5w? You're right though, I really don't think the difference would matter either way.
0w20 but not 5w20? I doubt the viscosity change had anything to do with it. Both are nearly identical in viscosity with current weather conditions.Maybe the 0W-20 is leaking down at the chain tensioner(s) or hydraulic lifters, even if the filter ADBV is working. You have two possible causes ... oil filter, or oil ... or maybe a combo of both.
I was responding to Zee's comment to dtyler post #19, 0w20 vs 5w20, so both 20 grades.One easy way is for one to be a 5W-20 and the other a 0W-40. But a serious answer is that it's completely temperature dependent. Above -30 or so it is quite possible for an oil with a lower winter rating to be thicker than one with a higher rating even within the same grade. It happens all the time when comparing ILSAC oils with certain European approvals, such as with the old green Castrol. One is not a "0 weight" and the other a "5 weight".
It sounds exactly like this:
This is my first time using a 0W-20 - not sure if this has anything to do with it.
I previously ran M1 and 5W-20's....never heard this noise until now.
Right, but even then it isn't impossible within the same grade but as I noted it's dependent on the temperature.I was responding to Zee's comment to dtyler post #19, 0w20 vs 5w20, so both 20 grades.
Yes, and we are talking about the same grade here.Not going to attempt to debate the chemistry of different oil weights however there is sound reasoning a manufacturer specs an oil weight for their engines.
Filter. The new RAM's with the 5.7L spec 0W-20, and we've been using 0W-20 in ours its entire life.Not going to attempt to debate the chemistry of different oil weights however there is sound reasoning a manufacturer specs an oil weight for their engines.
If your engine was quiet until this last oil change then what else could it be…..?
Filter? Oil?
Thank you.Very creative description. Appreciate a well turned phrase. Bravo!
No it isn't impossible but it was implied that 0w is a bit more viscous than 5w in general, post #19.Right, but even then it isn't impossible within the same grade but as I noted it's dependent on the temperature.