Hey guys today I went to Autozone to buy Castrol Syntec ow0-30 the European formula and bought 6qts and notice that 2 of those qts were a different shape, I'm just wondering if I got the same oil and second is ow0-30 too thin??? I'm hoping i got the best oil for my ls1.

 

Did it still say made in germany? GC 0w30 isnt too thin. The 0w is only when the oil is cold. Its actually a thicker 30 weight at operating temp than many other oils are.

 

Yeah It says made in Germany, and also when yall guys say that this motor is the best oil for the ls1, do yall based this on the oil being tested on european cars or have yall really seen this oil tested on LS1 cars.

 

Endless oil analysis results in LS1 motors... However this oil does perform well in other motors as well. I use it in my WRX as the subaru guys hold GC in equally high regard.