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Discussion Starter #1
I put straight 40wt. in the car, took a 500 mile trip, mostly xway, car ran like a clock but still knocking. Changed the oil to Rotella 15-40, plus added EOS from the Cadillac dealer. I replaced the EGR valve with the an original equipment one. Am preparing to take a 1500 mile trip through the mountains. Will keep my fingers crossed that all goes well. If I have a problem there's always U-HAUL.

Cob
 

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01 frontier , 89 Shelby CSX vnt
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hopefully it works for you as well as it did for me , if not you should make the trip fine , then once home you can look into going to the service style main bearing from gm
 

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Discussion Starter #9
Hi again,

Took the Cadillac on vacation, 1500 mile trip through the mountains, car ran like a clock, except still knocking, even though I changed the oil to Rotella 15-40 together with EOS additive, replaced the EGR with original equipment, premium fuel was used also. Any comments would be greatly appreciated.

Cob
 
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