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**asshanson** · 12-28-2015

Interesting. M1 has a pretty low breakdown temp @ 265. I'm using the Amsoil Dominator which has lower pressure ranking (#38), but good up to 300 degrees. I guess that really only matters if you're doing 20+ minutes at a time on the road course in summer without a good oil cooler. Most cars will never see 265+ oil temps, I think on the vette I saw 270 at the end of my second or third HPDE session on a summer day, pushing the car pretty hard.

I'm thinking the 2.5x price factor for the Amsoil isn't worth it.

12-28-2015	#239
asshanson immune from paybans Join Date: Oct 2005 Location: West Des Moines Drives: poorly Posts: 4,358	Re: Engine Oil Interesting. M1 has a pretty low breakdown temp @ 265. I'm using the Amsoil Dominator which has lower pressure ranking (#38), but good up to 300 degrees. I guess that really only matters if you're doing 20+ minutes at a time on the road course in summer without a good oil cooler. Most cars will never see 265+ oil temps, I think on the vette I saw 270 at the end of my second or third HPDE session on a summer day, pushing the car pretty hard. I'm thinking the 2.5x price factor for the Amsoil isn't worth it.