5w20, does not have to be synthetic.5w20, does not have to be synthetic.
synthetic Castrol 5W20
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.
5W20. It can be synthetic, conventional, or a blend.
SAE 5w20 conventional or synthetic.
5w20 it can be synthetic or conventional.
5W20, conventional or synthetic.
If you mean 5w20 synthetic the answer is NO. Pontiac recommends SAE 10w30 weight oil in Synthetic or Conventional. Use exactly that weight.
Not necessarily. The w just means it is a winter oil as in SAE 5w20. It is 5 weight when it is cold and 20 weight when it is at full operating temperature. It can be conventional or synthetic. The can will say Synthetic or Synthetic Blend if it is Synthetic.
5w20 synthetic is recommended. In my GT I use Mobile 1 Full synthetic