Originally Posted By: CATERHAM
Originally Posted By: tig1
Originally Posted By: CATERHAM
Originally Posted By: tig1
You might want to switch over to M1 0-20.
Why?
For a new Toyota I4, using M1 0-20 will give equal performance IMV, very easy to purchase, and cost probably is less if that is a factor.
It won't give equal performance since it's a heavier oil and massively so on start-up plus it's more shear prone. If one wants to run an oil with greater high temp' protection (I'm not saying it's necessary for street use) than the spec' high VI 0W-20 simply add a pint or two of M1 0W-40. This will give you a higher HTHSV than M1 while still being lighter on start-up.
All those numbers are interesting, but frankly I really don't know the differance when I see them. To say one 0-20 oil is "massively" better than any other is well, interesting also. I guess the only way to really know is to run one oil against another under equal terms, for lets say 200K (miles not KMs) and tear down the engines. I for one, don't see any reason to mix oils, as todays oils are so efficient their's one for every type of engine. However no harm either.