Originally Posted By: Pablo
Originally Posted By: CATERHAM
I'm suggesting using the Toyota 0W-20 at least until Amsoil comes out with a 20wt oil of the appropriate viscosity.
you have yet to post any evidence that Amsoil SAE 20's are not really SAE 20. Appropriate viscosity?
Pablo I know you like to obfuscate the issue but I never said Amsoil didn't offer 20wt oils. 20 is the SAE oil grade not the oils viscosity. Amsoil's lightest oil (by a small margin) is the XLZ 0W-20 with the viscosity spec's, HTHS 2.7cP and a 167 VI.
As I mentioned previously the Toyota 0W-20's viscosity spec's are HTHS 2.6cP and a 216 VI.
That translates into the Toyota oil being lighter at all oil temp's but particularly on start-up. At freezing (32F) it's a whopping 45% lighter, at room temperature 30% lighter and it is still over 20% lighter at 100F. And yes 100F is still a cold start for an engine.
Toyota engineers believe in the benefits of high VI motor oils but Amsoil doesn't make one. So OP has a choice. He can go along and use the recommended lubricate of the manufacturer of his wife's car or choose to ignore that recommendation and go with old school thinking of Amsoil.
Originally Posted By: CATERHAM
I'm suggesting using the Toyota 0W-20 at least until Amsoil comes out with a 20wt oil of the appropriate viscosity.
you have yet to post any evidence that Amsoil SAE 20's are not really SAE 20. Appropriate viscosity?
Pablo I know you like to obfuscate the issue but I never said Amsoil didn't offer 20wt oils. 20 is the SAE oil grade not the oils viscosity. Amsoil's lightest oil (by a small margin) is the XLZ 0W-20 with the viscosity spec's, HTHS 2.7cP and a 167 VI.
As I mentioned previously the Toyota 0W-20's viscosity spec's are HTHS 2.6cP and a 216 VI.
That translates into the Toyota oil being lighter at all oil temp's but particularly on start-up. At freezing (32F) it's a whopping 45% lighter, at room temperature 30% lighter and it is still over 20% lighter at 100F. And yes 100F is still a cold start for an engine.
Toyota engineers believe in the benefits of high VI motor oils but Amsoil doesn't make one. So OP has a choice. He can go along and use the recommended lubricate of the manufacturer of his wife's car or choose to ignore that recommendation and go with old school thinking of Amsoil.