It can be. The 5w20 is the weight of the oil which you can buy conventional or synthetic. If it is synthetic it will say so right on the container. If it does not say synthetic it is conventional oil.
5w20, does not have to be synthetic.5w20, does not have to be synthetic.
The correct oil weight is now 5W20; it used to be 5W30, but Ford has recently allowed your engine to use 5W20 as an energy saving oil. If you don't use synthetic oil, stick with the 5W30; non-synthetic 5W20 will burn out your engine faster than non-synthetic 5W30.
synthetic Castrol 5W20
5W20 synthetic.
5W20. It can be synthetic, conventional, or a blend.
If you mean 5w20 synthetic the answer is NO. Pontiac recommends SAE 10w30 weight oil in Synthetic or Conventional. Use exactly that weight.
5w20...use synthetic
5W20, conventional or synthetic.
5w20 it can be synthetic or conventional.
SAE 5w20 conventional or synthetic.
5w20 synthetic is recommended. In my GT I use Mobile 1 Full synthetic
Any name brand 5w20 synthetic or synthetic blend.