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Hello all...newbie here. :thumbsup:

I just picked up my 04 CTS last week, but I've been reading some good info here for the last 3 weeks or so. I like how no one can make up their minds on what type of oil is the best, sounds like the forum I was in before! I suppose everyone will have their own opinions, that's only natural. I did notice no mention of Royal Purple? I do know that their manual transmission lubricants are great, but I have never heard of the quality of their engine oil vs. Amsoil. Anyways, just wanted to say hello with a proper introduction.

Silver '04 CTS 3.6

Rockford, Michigan

R-
 

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01 Eldo ETC, 02 Deville SOLD!
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Rob_Rob said:
Hello all...newbie here. :thumbsup:

I just picked up my 04 CTS last week, but I've been reading some good info here for the last 3 weeks or so. I like how no one can make up their minds on what type of oil is the best, sounds like the forum I was in before! I suppose everyone will have their own opinions, that's only natural. I did notice no mention of Royal Purple? I do know that their manual transmission lubricants are great, but I have never heard of the quality of their engine oil vs. Amsoil. Anyways, just wanted to say hello with a proper introduction.

Silver '04 CTS 3.6

Rockford, Michigan

R-
When I first got my '99 Deville in August of '01, I read somewhere that Royal Purple was a great oil for the Northstar. This was before I found this forum, BTW...I paid $120 for a five-gallon drum of it...

The engine seemed a teeny tiny bit quieter, but that's the only real benefit I could find.

Changed it at the recommended interval.

Have been using dino oil ever since. Mostly Castrol GTX. No problems with three Caddys, total of 100K+ miles of ownership.

I'd say save your money and get whatever the owner's manual recommends.
 

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2006 STS-4 1999 Deville Concours
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Welcome Rob!

Thanks for joining the forum!
Paul
 
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