I used to run 10w30 M1, but the engine builder told me to run a 40 weight oil for the new engine with forged pistons. Once I run out of 10w40 Castrol GTX that I'm using for the break-in, I need to decide which Mobil 1 oil to use. Please don't suggest other brands, because I have a stack of Pep Boys calendars with Mobil 1 coupons that I plan to use.
Could someone please help me make sense of the specifications between these 2 oils? Some of it, like flash point, I understand, but I'm sure there are other factors involved which might not be indicated in the specs. I'm going to do oil changes every 3000 miles, so extended drains aren't important to me, just protection. I'd really appreciate your opinions, thanks!
Mobil 1 5w40 Truck & SUV:
http://www.mobil.com/USA-English/Lubes/PDS/GLXXENPVLMOMobil_1_Truck_SUV_5W-40.asp
Mobil 1 Extended Performance oils:
http://www.mobil.com/USA-English/Lubes/PDS/GLXXENPVLMOMobil_1_Extended_Performance.asp
Could someone please help me make sense of the specifications between these 2 oils? Some of it, like flash point, I understand, but I'm sure there are other factors involved which might not be indicated in the specs. I'm going to do oil changes every 3000 miles, so extended drains aren't important to me, just protection. I'd really appreciate your opinions, thanks!
Mobil 1 5w40 Truck & SUV:
http://www.mobil.com/USA-English/Lubes/PDS/GLXXENPVLMOMobil_1_Truck_SUV_5W-40.asp
Mobil 1 Extended Performance oils:
http://www.mobil.com/USA-English/Lubes/PDS/GLXXENPVLMOMobil_1_Extended_Performance.asp