Originally Posted By: ARCOgraphite
My Yaris is running GREAT with Castrol Syntec and Wix filter. Runs POOR with toyota filters and Genuine Toyota oil.
ARCO, please understand that I'm not asking this to hassle you, I'm just curious about your statement. I've heard of motors sounding different with different oils, but I've never heard of one running poorly just because of a certain brand of oil or filter. Can you shed some more light on this?