Drain plugs are getting smaller (1 Viewer)

[arcteryx]

Not limited to 80s, but can anyone explain why drain plug's socket size are smaller as the models get newer? For example, 40s and 60s require a larger socket than 80s or 100s.

 

[inkpot]

Newer motors run lower viscosity oil, so it drains out quicker?

 

[Kernal]

Lessons learned (by Toyota) maybe; smaller wrench = less torque applied by grease monkeys = less likely to over-tighten drain plugs??

 

[arcteryx]

Both are valid points! Not sure, just wondered if there was a definitive answer.

 

[NLXTACY]

Less material therefor less cost.

 

[retrofive]

Uh oh.

 

[PDoyle]

Ancient japanese secret.

 

[Douglas S]

Less material therefor less cost.

Yep