GC 0w-30 in cadillac CTS

[TX_SS]

dealer recommends 5w30 Mobil 1 but i went ahead and used this GC stuff. ive heard about it on ls1tech.com and i tried on my 99 hawk and it burned soo much that i went back to ole conventional 10w40 Valvolin. anyways, is it too thick for my motor? or should i go back to Mobil 1 5w30.

waht yall think?

 

[Quattro Pete]

How often are you planning to change it?

 

[Vivisector]

Can't say for a Cadillac, but as far as weights go, 5-30 if anything should be thicker at cold temperatures and the same once at operating temperature. The GC has been said to be a high 30, but really shouldn't make much difference.

 

[Roy Gutfinski]

As far as I am concerned, GC is one of the best quality oils currently available in the U.S. Yes, it is a high 30, almost a 40.

 

[98LSC32V]

Is this the 3.6 DOHC CTS?

 

[Winston]

It should work great. A little thicker than most 30 weight oils, but it still is a 30 weight.

Is it the CTS-V?

 

[B00SS]

I have been using GC in my 2000 Camaro SS. I will be doing a used oil analysis on this extreamly beaten oil. What I put it through is fairly severe service.

 

[Mike_dup1]

I run Amsoil 0w30 in my 2005 CTS 3.6 VVT engine, for all of it life less the first 5,000 miles on the OEM Mobil 1. So far in about 20g miles, my oil has not gone down at all. Stays on the full mark and I change once per year, in Nov.

 

[TX_SS]

it is 3.6 dohc.. i only change it if itz dirty. if im running it longer should i just change the filter?

 

[AstroVic]

Quote:

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i only change it if itz dirty.

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Bro, that's a horrible way to determine the OCI for your car!!!

What do you mean by "dirty" anyhow?

It LOOKS dirty? Or you have UOA evidence to say it *is* dirty?

#@$%!? It's a Caddy! Don't be such a cheapskate! You'd be better off changing the oil/filter more frequently with a low-cost oil/filter combo.

Just my two cents.