AC,
Top1 is only a synth blend, not a full synth oil. Try buying Mobil 1 from autosport along 20th ave in cubao, cheaper than most.

icon,
Could it have been mobil 1- 15w50? Have not heard of a 15w40 grade in mobil1. You can use the 15w50, specially for high rev or turbo engines. This is what i'm using in a miata since they run hotter than usual.

scarab,
what viscosity are you using now- 5w30? Is the havoline energy a full synth oil? A 5w30 oil may be thin if not a full synth.
What viscosity