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Just change my oil (2005 3.6 CTS)

32K views 24 replies 10 participants last post by  z06bigbird  
#1 ·
Let me just say....that clearly....the EASIEST oil change..ever. Period.

After I had to use all my might to loosed the 13mm oil drain plug....lol....simple. It drained out....replaced the filter.....drank a beer..it drained all the way...replaced the drain plug....

Then.....something just cuz I dont fully know...but I dropped 7 full quarts of oil in her. Is 7 normal??????????? I mean..it's okay and all..I just thought it was supposed to take a little over 6....

But..I used Mobil 1 52-30 Syn....and the dealership had used Castrol Syntec........but now man..my car runs waaaaay better for whatever reason. So SMOOTH.......its wild!

Do your own oil changes..it's a SNAP!!!!!
 
#3 ·
I guess my real question is...is 7 quarts TOO much oil? I don't want to be blowing seals or anything. It didn't come out the top of the motor or anything...i haven't had a chance to gheck the dipstick tho..

Anybody know off the top of the head what the owners manual calls for quart wise?????
 
#9 ·
ok so this is prob the dumbest question but I did my first oil change at the dealership and it was a little pricey. I want to do the next myself and was wondering how you get the nessary clearance to do all the work? I bearly can reach the plug if i were to lay as close as possible to the cts. Do you guys use those low ramps you drive on? I have 2 pairs of them and if i would try to drive the caddy onto them, i wouldnt be able to since its stance is so low (mind you its not lowered or anything).

Thanks
 
#10 ·
You can use the ramps if you need to..I could actually reach the plug from the passenger side...but I ended up having to use the spare tire jack to raise it a little..because apparently Hercules put my oil drain plug on when i bought the car. I had to raise it to get under it in the front....and pull with everything I had to loosed the damn bolt...

But you should necessarily 'have' to. But you can use the ramps...or a jack...whichever...
 
#15 ·
My 2007 owner manual says to use any 5W-30 oil meeting GM Standard GM4718M.

Also says that the car was filled with a Mobil 1 synthetic oil at the factory.

And has a capacity for 6.0 qt of oil. (thats for all engines with the CTS, 2.8, 3.6 and 6.0)

I havent done my own oil yet, only had one change so far and had a coupon for free first maintenance, so I used that.

And the next change I wont be doing either because my dealer gave me a free oil change and filter coupon because I brought them the GM customer satisfaction survey and they filled it out and sent it in for me, haha
 
#21 ·
Did you look at the dipstick to see how high the oil level is, that is how you tell if you have to much (car on level ground). Just because it went in and did not flow out the top is not an indication that it is ok. You could put twice that much oil in the engine and it would go in, the problem is that it is hard on crankshaft and bearings. When it has to push that much oil out of the way, it churns it up into a foam. When that foam is pumped into the oil pump it damages the bearings. The foam also overpressurizes the engine and blow out the seals.