Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - View Single Post - Best Break-in Procedure

smbrm · 06-05-2012, 05:23 PM

The reason they don;t want you to use cruise control is so that the engine does not run at a fixed rpm for a long time. You want as much variation in rpm as possible for the breakin period. I usually run at different engine rpms in different gears on the highway to get that breakin. so run at 100kph for a while, then at 90 kph then at 80 kph then 90kph then 80 kph then 100 kph mix it up and change the order. That way the engine sees a variety of rpm's.
That has always worked for me and I have had cars for 20+ years.

06-05-2012, 05:23 PM	#163
smbrm Senior Member Join Date: May 2010 Drives: Scion FRS Ht Lva(AT) Location: Alberta Posts: 409 Thanks: 30 Thanked 81 Times in 54 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	The reason they don;t want you to use cruise control is so that the engine does not run at a fixed rpm for a long time. You want as much variation in rpm as possible for the breakin period. I usually run at different engine rpms in different gears on the highway to get that breakin. so run at 100kph for a while, then at 90 kph then at 80 kph then 90kph then 80 kph then 100 kph mix it up and change the order. That way the engine sees a variety of rpm's. That has always worked for me and I have had cars for 20+ years.