0W20 causes lifter tick whereas 5W20 does not.

[SuperFast]

Originally Posted By: Errtt
Originally Posted By: TFB1
Sheesh, mebby I'll just run without oil and ignore the noises...

It will eventually become quiet, so quiet you won't hear all the noise.


because your engine will seize up from no protection

use recommended oil weight dont go all dr haas unless you have a perfect engine you can maybe lose ? .

 

[SuperFast]

Originally Posted By: CATERHAM
Originally Posted By: hounddog
I had slight but noticable timing chain noise at cold start on a 2006 Mercury Gran Marquis with 4.6 using Amsoil 0w20.No noise what so ever using 5w20.

Amsoil 0W-20 with it's HTHS vis of 2.8cP and KV40 of 49.1cSt is heavier than all 5w20 conventionals and most other syn 20wts at all typical start-up temp's.
So figure that one out!


my giess is that the 5W-20s have lower HTHS and therefore its 0S-20 rating is high on the "0" side of the SAW system, and 5W-20 is better in those apps.

 

[CATERHAM]

In my experience, an oil's chemistry plays as much a role in dealing with lifter noise as an oil's viscosity.
In particular, an oil's tendency for entrainment varies markedly with different oils. I've experienced lifter noise with a 20w50 conventional and perfect silence with Toyota's (Nippon oil) 0W-20 in the same engine.

My advise therefore is to try a different brand or two of the same viscosity before giving up and going with a higher viscosity oil altogether.