I just changed my oil [V6 automatic] LE 63,000 oringinal oner miles on it .I used penzoil 10x 30 weight and for the first time changed to Castrol regular oil 5x30 weight ,its recommended all over the owners manual to use 5x30, I also use only Nissan oil filters ,when I parked in to drop the wife off I noticed a slight dampened knock sound on the right engine bank for the first time, it goes away when you ride or rev it up a little. I used my stethoscope and couldn't really hear any unusual noises from the top of the engine, could it be a bad filter or a knock sensor? or whats your opinion.

rhondas wrote:I just changed my oil [V6 automatic] LE 63,000 oringinal oner miles on it .I used penzoil 10x 30 weight and for the first time changed to Castrol regular oil 5x30 weight ,its recommended all over the owners manual to use 5x30, I also use only Nissan oil filters ,when I parked in to drop the wife off I noticed a slight dampened knock sound on the right engine bank for the first time, it goes away when you ride or rev it up a little. I used my stethoscope and couldn't really hear any unusual noises from the top of the engine, could it be a bad filter or a knock sensor? or whats your opinion.

recheck your oil level.. that's one of the symptom of low oil level...

fleurys wrote:

rhondas wrote:I just changed my oil [V6 automatic] LE 63,000 oringinal oner miles on it .I used penzoil 10x 30 weight and for the first time changed to Castrol regular oil 5x30 weight ,its recommended all over the owners manual to use 5x30, I also use only Nissan oil filters ,when I parked in to drop the wife off I noticed a slight dampened knock sound on the right engine bank for the first time, it goes away when you ride or rev it up a little. I used my stethoscope and couldn't really hear any unusual noises from the top of the engine, could it be a bad filter or a knock sensor? or whats your opinion.

recheck your oil level.. that's one of the symptom of low oil level...

I just checked the level and its up to the prper top level.
thanks for the information.?

rhondas wrote:

fleurys wrote:

rhondas wrote:I just changed my oil [V6 automatic] LE 63,000 oringinal oner miles on it .I used penzoil 10x 30 weight and for the first time changed to Castrol regular oil 5x30 weight ,its recommended all over the owners manual to use 5x30, I also use only Nissan oil filters ,when I parked in to drop the wife off I noticed a slight dampened knock sound on the right engine bank for the first time, it goes away when you ride or rev it up a little. I used my stethoscope and couldn't really hear any unusual noises from the top of the engine, could it be a bad filter or a knock sensor? or whats your opinion.

recheck your oil level.. that's one of the symptom of low oil level...

I just checked the level and its up to the prper top level.
thanks for the information.?

Then, did you check the post about power valve issue... it is another symptom.. (noise at idle, no noise at rev...)

fleurys wrote:

rhondas wrote:

fleurys wrote: recheck your oil level.. that's one of the symptom of low oil level...

I just checked the level and its up to the prper top level.
thanks for the information.?

Then, did you check the post about power valve issue... it is another symptom.. (noise at idle, no noise at rev...)

is this the post thanks
http://www.thenissanpath.com/viewtopic. ... e27bb6d4d6

try this one : http://npora.ipbhost.com/index.php?showtopic=14826

When I purchased my 2001 Pathfinder (used) it started knocking and pinging a bit. I found out that the previous owner had not been using Premium fuel, so I started with that and it immediately solved the problem. Don't know if it helps, but I thought I'd share.

Theres no literal reason why a recent oil change should be the cause of this knocking.
The minor "viscosity change, wouldn't be the issue.
PERHAPS the minor differences in lubricity of the syn. vs. dino could be causing some "changes" internally....but THAT's a long shot.
if anything -- synthetic should QUIET an engine.

You're using two of the cheapest (literally) OIls on the market, btw.
Castrol is NOT a good quality base stock Synthetic (unless it was produced in Germany)
5w-30 is a good choice for winter driving when temps can dip below 0degf.

I'd recommend not running it past 5k miles -- but looks like you don't drive much.....so 3k.
Oil IS very subjective, however....i digress.

Give that knock some time to "settle", but keep an ear on it.

Cracked passenger side exhaust manifold? Will it go away after it warms up?