Originally Posted by Bettez88
Originally Posted by wdn
Originally Posted by CR94
Originally Posted by wdn
... The oil change interval on the 2009 Corolla is 5,000 miles. It's in the owners manual.
At the time, Toyota's recommended interval may have assumed non-synthetic oil. For later ones with the same engine, 10k intervals are officially recommended for (synthetic 0W-20) oil and filter. However, the OE Toyota filter I ran for about 18.5k (two oil changes) in my car (which has essentially the same engine) came out looking good-as-new, except the few barely visible carbon particles it had captured.
The 2009 Corolla uses 0W20 synthetic. Again, no point going back and forth on this I have the 2009 Corolla maintenance interval manual right here. Sure car companies sometimes change their intervals different model years. I am responding to the false information on that web page listed by OP, that is about 2009 Corolla. If you want to follow your own maintenance methods on the same or different car go ahead.
https://www.toyota.com/t3Portal/doc...a%20SMG%20123138%20Eng%201st%20Print.pdf
So just stick to my 5k synthetic oil changes then?
If most of your driving is short trips, less than 10 miles, I would change at 3K. I do this and change the Toyota OEM filter every oil change as they are so inexpensive anyways.
Personally, I would never go over 5K with any oil. As you can see, I keep my cars loooong term and that does influence my short OCI. My belief is car manufacturers have lengthened
the OCI's because they want to sell more cars. I could be wrong. I listen to agco.com podcast and they say they hardly ever did engine repairs years ago when everyone did the 3K OCI. Since we have trended towards the long OCI's they do engine repairs every week. They are convinced the repairs have increased because we have stretched out our OCI's. This makes sense to me but I have no way to prove it. They say they see it. That's all I know.
I will say this. It sure makes me more confident my cars will last when I drain the oil and it is not black as the resin in my gas grill. LOL