i took the car and had it switched to mobil 1 syntec,all I can say is the engine loves it,you can tell the engine is not having to work as hard,did the same with my Vibe before

 

I always use Mobil 1 for my Cobalt. I have always used synthetic on my old cars but Mobil 1 is the only oil touching the balt.

 

yeah I am going back to mobil 1 next change. I am runnung royal purple now..But I dunno I like the mobil better..IMO

 

Ooooooo can I join teh club? Can we have a secret handshake?

 

this has probably been covered before...so what your saying is youve all had your cars oil switched to mobil 1 synthetic?

 

Mine was born and raised on Mobile 1 fully synthetic..lol

 

my last car i switched also,well worth it.

 

What kind of car do you have? all SS SC come with mobil1

EDIT: NM, just saw this is posted in the 2.4 section

 

^^^I expected more of you


But Mobil 1 user here

 

I have the 2.4 G5 GT...oh yeah I managed to pick up the underwear lateron

 

Anybody else got some engine noise since switching to Mobil 1? Sounds like piston slap and goes away after a minute or so.

 

I think it's somewhere in the head, I get the same sound

 

Just the valvetrain i bleive

 

I haven't noticed any noise from mine..

 

mine has the noise... its very low at idle.. it was great watching the guys trying to figure out how to get the engine cover off and find the filter... must have been their first cobalt.

 

I use Castrol Syntec 5w 30... Maybe I'm an idiot. I dunno.

 

HMMM...I will have to check again and see if mine doesn't make the same noise and I just haven't noticed it since so many people are saying that theirs does...

 

i used that on my 04 cav when i had it... never had a problem and i changed the oil every 6k miles.

 

amsoil. feels like buttah
mod1 is bottom of the barrel synth...

 

Amsoil? The only truly independant site I've ever seen testing Mobil 1 vs Amsoil found it was safe to run Mobil 1 to 18k. The Amsoil only made it to 14k because it thickened from 5w30 to 15w40. Other than that, oil performance was similar between both brands.

Amazing the difference between what Amsoil's websites say and reality is.

 

yea nothing beats mobil1!

 

i wanna switch to synthetic...i just got my car last week. what brand should i get?

 

my question is how an oil 'switched' from a 5w30 to a 15w40? obviously this means the viscosity increased, but that 30 to a 40? thats odd for sure. I hope the independant test was a little more scientific than timing how fast oil poured out of a bottle.

 

Let's see...oil sample taken every 1000 miles and sent to blackstone laboratories for analysis. Amsoil did slightly better than Mobil 1 in the testing but the slight amount can be attributed to engine break-in during the Mobil testing. Mobil 1 did not thicken like Amsoil did.

http://neptune.spacebears.com/cars/stories/amsoil.html

What the tests prove is that both oils are great. But one is claiming ridiculously long change intervals.