AMSOIL vs Royal Purple - Toyota Yaris Forums

SilverGlow · 11-25-2008, 10:05 PM

Use the synthetic that's on sale. Either one will allow your engine to last through 300,000+ miles. In addition, it is a waste of $$ to not extend your oil changes if you go with synthetic. However if your car is still under warranty, I would not go more then what the manual states. After the car is out of warranty, then go with synthetic and the oil should be good for at least 7,000 to 10,000 miles, depending on how you drive, where you drive, and the brand of oil.

At the end of the day, you can put the "worse" synthetic oil in your car, and it will still pull strong at 300,000+ miles...this is something no one really wants to admit because for most, oil is "religion" and their preferences are more found in very subjective reasons, devoid of scientific back up. ;-)

Before you change out a particular brand, do a UOA and use that as a base line when trying other oils, or you could just get what's on sale and call it a day.

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11-25-2008, 10:05 PM	#9
SilverGlow Banned Drives: 2007 Yaris Hatchback Join Date: Oct 2008 Location: Southern California Posts: 189	Use the synthetic that's on sale. Either one will allow your engine to last through 300,000+ miles. In addition, it is a waste of $$ to not extend your oil changes if you go with synthetic. However if your car is still under warranty, I would not go more then what the manual states. After the car is out of warranty, then go with synthetic and the oil should be good for at least 7,000 to 10,000 miles, depending on how you drive, where you drive, and the brand of oil. At the end of the day, you can put the "worse" synthetic oil in your car, and it will still pull strong at 300,000+ miles...this is something no one really wants to admit because for most, oil is "religion" and their preferences are more found in very subjective reasons, devoid of scientific back up. ;-) Before you change out a particular brand, do a UOA and use that as a base line when trying other oils, or you could just get what's on sale and call it a day.