Just threw some in my pick up truck. The engine is a lot quieter. Saw a video on youtube that did dyno runs with castrol edge, royal purple and I think mobil 1 and another I never heard of. The 1 I never heard of produced the highest hp numbers and the edge and RP were the same and the last was way lower. Ehey. Gonna go amsoil next time but the castrol is so readily available. Seems like good stuff.
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