Mobil115W50 3700mi 03Nissan Frontier Supercharged

[CaspianM]

Increasing trend for lead numbers is troubling.
Take the dist out clean it and reinstall it if possible.
Flush the engine with a short OCI(use the recommended oil). Take it to the dealer for an oil change and later send another sample in.

I wouldn't sell this to someone else if indeed it has bearing issue. That is not right. But that is just me.

 

[VG33ER]

The supercharger was not replaced, but was inspected by me and the technician and found to be in good order. The M-62 blower has coated rotors (teflon coating?)which can flake off and cause problems. My rotors and bearings in the supercharger showed no signs of problems.
The only possible explanation that I have (outside of a bad engine from Nissan to begin with)is the contamination from the original distributor drive gear that I mentioned in an earlier post.

 

[VG33ER]

Cleaning the distributor drive at this point (~10K miles) is too little too late. If this is the culprit, most likely damage to the bearings is already done. I asked the technician to please carefully clean the distributor drive gear for this very reason. I don't know for a fact if it was cleaned and cleaned properly.
Perhaps he forgot, after all, we are all human.

 

[CaspianM]

Most likely the dist it is not the only source (if any) since numbers are growing anyway. I said that just to make a fresh start. I did not know that amount of lead can do so much damage.

 

[Nick R]

First of all, likely the oil is WAY too thick. Stick with 5W-30 at thinnest, and maybe you should consider a HDEO 5W-40.

 

[JoeFromPA]

This oil is absolutely fine in this engine. Members of this forum who make a claim that the oil isn't right are missing alot of crucial information.

The owners manual will spec/show that 15w50 is suitable for certain usages and temperatures, of which yours is fine.

 

[hooligan24]

We use 5w30 M1 high mileage in our 03 S/C'd Xterra. give me a few minutes and I will find our latest UOA and the info from the owners manual.

 

[hooligan24]

The Owners Manual states to "use API SJ or SL, energy conserving oil." Ilsac GF-1 GF-II and GF-III oil can also be used.

RECOMMENDED SAE VISCOSITY NUMBER

Quote:
-SAE 5W-30 viscosity oil is preferred for all temperatures. SAE 10W-30 or SAE 10W-40 viscosity oils may be used if the ambient temperature is above 0*F(-18*C).



I cant seem to find our latest UOA, but here is one from a while back. I think this was Amsoil ASL



Quote:
The owners manual will spec/show that 15w50 is suitable for certain usages and temperatures, of which yours is fine.


15w50 is not listed anywhere in the owners manual