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Switched to Rotella 10w30 and idle knock is more prominent

R

RadioShackSpecial

NAXJA Forum User
Location
Michigan
Over the weekend I switched to Rotella 10w30 from Valvoline High mileage full syn and the knock at idle seems to be louder. The reason I switched was from lots of comments in regards to Rotella for its ZDDP content.

So my question is should I switch back? Anyone had this problem?

Specs: '96 XJ with 180,xxx.
 
I run the Rotella 10w-30 in all of my 4.0's with no problems. Your engine may have some issues. I really can't explain why it would suddenly start making noise with a oil change though.
 
Issues, we all have issues. I know she has lifter tick. Must just be me being over critical. Its not a rod knock, so idk. Im over it, just run it till she blows.
 
RadioShackSpecial said:
Issues, we all have issues. I know she has lifter tick. Must just be me being over critical. Its not a rod knock, so idk. Im over it, just run it till she blows.
Click to expand...

Good attitude! With that noise you will probably only get around 300K before it blows. :D
 
i run the rotella diesel, some MMO, some lucas and some of the blue risolene stuff and now the only tick i have is a loud one from a bad exhuast leak.
 
The Valvoline was 5w30. So would the 10w40 be that different? Enough that my cold knock would in turn be louder? Now Im curious, I almost want to put some 5w30 back in it to see if Im just crazy.

Current setup: 5qts 10w40 Rotella w/ 1/2qt Lucas Oil Stabilizer. Oil level is at 3/4 mark between add and do not over fill.
 
i want to switch over to the rotella T, but i plan on going up to the snow a few times but live in a moderate place... would 10w30 still be my oil of choice?
 
Rotella has a higher level of ZDDP which on a flat tappet motor like the 4.0, will allow the cam to last longer. Mobil 1 is a great oil it just has a lower level of ZDDP, its better suited to more modern engine designs and the 4.0 is everything but modern.

Do a search on here, we have beat this dead horse to oblivian:D
 
Not sure why, but when running Full Synthetic, noises are more prominent.
I plan on running Amsoil 5-30 after I break my motor in, have less than 100 miles on it now.
 
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