When should I start using synthetic oil?? - Toyota Yaris Forums

UTVitz · 06-15-2009, 12:27 PM

I tried Valvoline Synthetic in my '08 Yaris for a month-it did not like it one bit. From a noticably noisier engine to a significant drop in my MPG (I always run in the 40's with it till I tried synthetic and it droped into the high 30's for the entire time the oil was in it). I went back to conventional valvoline after a month and suddenly the engine seemed more dampened in operating noise and my MPG went right back up to 43. This is only my experience with it and I've read a few others that noticed this same effect with their Yaris.

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06-15-2009, 12:27 PM	#14
UTVitz Drives: Black Vitz Liftback Join Date: Dec 2008 Location: Salt Lake City Posts: 238	I tried Valvoline Synthetic in my '08 Yaris for a month-it did not like it one bit. From a noticably noisier engine to a significant drop in my MPG (I always run in the 40's with it till I tried synthetic and it droped into the high 30's for the entire time the oil was in it). I went back to conventional valvoline after a month and suddenly the engine seemed more dampened in operating noise and my MPG went right back up to 43. This is only my experience with it and I've read a few others that noticed this same effect with their Yaris.