15-05-2021, 08:49 AM
(This post was last modified: 15-05-2021, 08:52 AM by Bob Culver.)
This topic has been raked over and over. Through the 1950s to 70s most garages had full EP 90 and 140 and that is what all cars got, Sevens included, when they were very occasionally serviced. (I have seen a few with the pinion teeth worn right through. Presumably the deaf owners never checked the oil)
Early EP oils were claimed to corrode copper and hence early bearing cages and side bushes. Despite an enhanced EP action, most modern manufacturers claim current readily available full EP GL5 do not corrode esp at the modest bulk temps in an Austin diff transmitting 20 bhp or much less (cf 300 in a truck.)
I suppose some cars may still have bronze caged bearings.
Has anyone encountered cages crumbling like old plumbing fittings? Or side bushes very worn despite smooth axle surfaces.
Has anyone irrefutable evidence of damage by a modern full EP oil from a major manufacturer?
My car has a Regent or Remax cw and p with what seems to be a soft cw. Quite worn in despite full EP. dunno how it would have fared on a low or non EP.
Early EP oils were claimed to corrode copper and hence early bearing cages and side bushes. Despite an enhanced EP action, most modern manufacturers claim current readily available full EP GL5 do not corrode esp at the modest bulk temps in an Austin diff transmitting 20 bhp or much less (cf 300 in a truck.)
I suppose some cars may still have bronze caged bearings.
Has anyone encountered cages crumbling like old plumbing fittings? Or side bushes very worn despite smooth axle surfaces.
Has anyone irrefutable evidence of damage by a modern full EP oil from a major manufacturer?
My car has a Regent or Remax cw and p with what seems to be a soft cw. Quite worn in despite full EP. dunno how it would have fared on a low or non EP.