Do I need zinc?

[edmonds27]

for the past several years Ive been using Rotella T oil in the car and have been adding a zinc additive from Oreillys. The other day the car had a loud taping noise, turns out the rockers weren't getting enough oil to them. I pulled the Push rods and found that they were full of sludge. I flushed the system and the tapping went away after I changed the oil with Rotella minus the additive. Could this junk from oreillys be causing this sludge?

 

[turbo nasty]

What was/is your oil psi at idle?

 

[edmonds27]

What was/is your oil psi at idle?

Then really low like 15-20 psi, now its like 50-55

 

[charlief1]

In the old days sludge was caused by paraffin based oils and lower engine temps. What are the engine temps and how long do you run it when it's running?

 

[Nick Micale]

I would use Rotella as a break-in oil for a new engine, but I would never use it in a turbo engine with lots of miles.

Diesel oil contains lots more detergent than motor oil, and it also has less anti-foaming additive as their normal operating RPM is about 1/2 of our turbo engines.

Yes, your engine needs zinc, but use a known, proven product like ZddPlus

 

[novaderrik]

some light reading:

http://www.chevelles.com/forums/showthread.php?t=482217&highlight=

 

[GNGAL]

Great read... local car club member has been pushing me to get zinc additive. Very informative. Thx

Posted from the TurboBuick.Com mobile app

 

[turbo nasty]

Bro do you even Zinc? LOL Use good name brand oil like Valvoline and add zddplus and no worries.