Some people refer to the W as weight. If you feel 30 will offer your Corolla better protection than a 20 viscosity, it is your Corolla. I keep my cars for a long time and many miles. Break-in oil I feel that he may have been spoofing me too. I don't think its worth it time or money-wise. I doubt that Toyota would do it, but if the engine failed and oil change recipes of any kind couldn't be provided, they could simply say that the engine failure put too much stress on the trans.
It would seem then that synthetic is obviously better for your engine. All of these fluids are extremely harmful to your eyes and skin so it is important to protect yourself. They have to prove the oil change interval caused the problem. It takes a while for them to seat wear so that they seal properly. Carburetors, valves, engine coolant, leaks, washer fluid, engine coolant and radiator fluid are easy to replace.
For those of us in areas where 100 degrees is common in the summer I would think that 0W-30 would be better. I did not design the engine. . If you are planing on trading it before you get to 100,000 miles, it is of little importance. I asked my Toyota service manager and he, of course, wants to stick with the 0W-20 because that's what's in the book. Their high flow design can help to improve engine performance by reducing oil filter restriction. Even with longer oil change times, you usually have to change the filter and add a little oil.
If you want to skip the 5k service just turn the mesg off. Might even add value to my 2 cents worth. We have a high mileage van and the engine runs well, too. That said - if you want to go with extended drain intervals - synthetic oil is what you want to use. For the sake of your warranty, do what the mechanical engi. They can't deny a transmission repair because you don't change your oil enough.
Sorry to bump an old thread but to me it is still relevant. Also, ran a Camry on conventional oil on 5K oil changed - has more than 200K on the clock currently and still tip top. Actually there is a lot of truth to the above information. On another note, the only brand I can find 0W-20 in 5 qt. So from a practical standpoint, are you going to drain the oil into another container and then put the old oil back in again? My daughter has a 2014 Camry. I finally got the plug to attach after I had the filter off.
Sounds like after I recieve my first two complimentary oil changes I should switch over to the 0W-30, at least for summer driving. New oil means less wear. It's an incredibly huge business and if everyone started cutting their oil change frequency in half, many of these companies would go bankrupt straight up. In fact, synthetic blend oils are actually a mix of conventional oils and synthetic oils. I am still struggling with going away from every 3,000 miles. Just out of curiosity, I found the previous invoices, and it says the same for 5k, but there was an oil change for10k service.
You never know what could be dripping down from the engine, battery acid, engine coolant, brake fluid, etc. For previous model years, The Corolla was specified to use 5w-30 on different engines than the current one. Living in a desert or at high altitude 10k feet will cause your engine to always run hotter. Also, it has better properties at high temperatures, slightly better viscosity and it is overall more resistant to breakdown than other motor oils. Under severe conditions this oil lasts 15,000 miles constant towing, hauling, idling, or dusty environment. She and I agreed that she would bring me the vehicle every 7500 miles for an oil change and we would re-evaluate from there.
I had a 2004 Corolla before and oil change was required every 5k miles. But I want to pay. Nothing like that has happened yet, but I keep an eye on it. Here are some examples of people who would be wise to use synthetic. Unlike regular motor oil, synthetic oil can last more than 6 months before it starts to become less effective. Submitted 2018-04-12 By Steve From undisclosed Filter and o ring seals appear to be made well.