2011 Toyota RAV4. Just went in for my winter oil change. I like to change the oil myself, but it's too [censored] cold out, so I begrudgingly let the dealer do it as they had a special on synthetic 0W20. I noticed the service advisor typing away and saw that she had down for regular 5W20. So, I politely asked for the 0W20. She responded by telling me that I would now have to use 0W20 from now on because you can't switch back and forth between synthetic and mineral oil. I was pretty floored by the stupidity. My response was a rather sarcastic "Uh, yeah, you can." This got her back up a little bit and she then responded by saying that "well, you shouldn't". Really? Why? Is there a Toyota TSB to back up your [censored] statement? Every oil manufacturer states that synthetic and mineral oils can be used without issue and mixed if necessary. [censored], what about semi-synthetic oils? I told her to put the 0W20 in and walked away in disgust. I'm already planning the wording of the email that I'm going to send to the dealership service manager and possibly Toyota Canada.
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