crazy fork oil idea?

[R100]

Fork oil is getting really expensive.
My '66 Triumph took motor oil in the forks.
Nothing on the shelf except Rotella T 15-40.
Worth a try?

[Tim Allman]

Why not?

As long as there is sufficient lubrication there will be no mechanical damage and the Rotella T will certainly prevent that. The question is whether you are happy with the shock absorbing properties of the forks. If they are too stiff go for a lighter oil, otherwise try a heavier one.

I have always use automatic transmission fluid (non-Ford) with success but that is only because it was recommended to me long ago.

[bamacl]

Late 70's through the 80's Honda recomended Dextron atf. Lot of fill ups with a qt.

[Mike Mullins]

I think the ATF was used because of its anti foaming properties.