I've read various threads in the past as to people's reasons for using either ATF or power steering fluid in the power steering system. We all know that, in some of our cars, it is ATF that's recommended in the manual. But, ATF formulations changed. So a lot of us just use generic power steering fluid....whatever's cheap at Walmart.

My question: is there any problem with mixing the two fluids? If so, why?

My method of renewing the fluid is simply to drain and fill the reservoir periodically....I'm just not interested in completely flushing the system. So, with the SDL I just acquired (PO used ATF) I was just going to start fluid renewals using power steering fluid.

__________________
14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 158k miles
06 E320 CDI "Rutherford", Black on Tan, 177k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 144k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 72k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife