I switched to dino in my Corolla as I could no longer justify running synthetics in this car( only 3900 miles driven in close to 8 months). I put in Supertech 5W30(grey bottle)with a ST4967 filter.Feels real smooth,peppy and slightly more quiet with this dino oil vs M1 in this engine(1ZZ-FE).Also for some strange reason there is a slight increase in gas milage when I run this stuff over M1.It's real small but noticible to me. It also idles about 100 rpm lower with Supertech as oppose to M1. For good measure I drained my tranny and added 4qts of fresh ST ATF as I have really good results with this stuff. Flushed in a quart of ST ATF in the power steering system too.Operates slightly smoother and quieter than before(BG flush used before). All these fluids(plus a filter) cost me $11 bucks and change.Not bad for an oil change,transmission service and power steering flush. Car runs better than ever with this stuff for some reason. Next up is ST antifreeze flush completing the Supertech axis of evil .