[GLHS60]

My anecdotal tests confirm no synthetic has the viscosity of #30 in Engines with excessive main bearing clearance.

I've been randomly mixing oil for years and haven't had any oil related failures.

My old 2001 Sebring 2.7 has run every combination including # 40 and still purrs at 320K

Thanks
Randy

 

[GLHS60]

I think you are possibly comparing apples to oranges, or worn part "ticks" to hydraulic "ticks".

You had some failing rockers that tick when worn out and you replaced them and the tick went away.

Another time you tried an oil supplement and the tick went away, likely due to the hydraulic lash adjuster.

Again you have a tick, more likely due to another rocker failing as is apparently common in some 3.6's

Oil supplements and or different oils can have an effect on hydraulics.

However, worn out rockers as shown in the 3.6 tick videos tick until replaced, oil will not repair the metal.

The ticks mentioned can be very close in sound which can often be confusing.

As you have experienced broken rockers replacing them all would be prudent.

Replacing hydraulic lash adjusters at the same time would also be wise as they are in the same spot.

Replacing rockers/lash adjusters would be my first step.

If the cams aren't scorched there may be no need to go further.

Thanks
Randy

It only worked for about 6 months to quiet the lifter noise. Now, i am going to have to open up the engine and replace some things to stop the noise. Hopefully, it is not more than the camshafts, timing chains, valve lifters and arm valves thingys

 

[GLHS60]

Let me say this again please, if any oil change or supplement reduced or eliminated the noise it is hydraulic lash adjuster related.

oil = hydraulic

Remember the STAR Case bulletin, S1309000016 I posted on one of your threads??

If one follower is faulty, its recommended to replace them all.

Oil will not repair a faulty follower for 6 months, 6 days or even 6 minutes.

Thanks
Randy

 

[GLHS60]

Follower = rocker arm
Lash adjuster = lifter

Thanks
Randy

 

[GLHS60]

Close but not exact.

Finger followers are used in many OHC Engines like the 3.6.

They can be roller or slider.

The follower follows the cam shaft directly, whether slider or roller.

Each have their benefits and drawbacks.

Traditional lifters are lifted off the camshaft to transmit motion through pushrods & rockers, to the valve.

Lash adjusters, often called lifters don't lift anything, they absorb the lash, hydraulically, if hydraulic.

Lash adjusters are often called lifters, even tappets, they don't lift but they can tap.

Followers are often called rockers, but they don't actually rock.

Thanks
Randy