Thanks all for good advice. I'm definitely changing it.

@Roger_850T: good point about dealer's liability motives...I was thinking the same thing. Thanks for the VIDA insight too.

My mechanic uses AMSOIL fluid, by the way.

Thanks for all your replies. Yes it's a 2.5T. The dealer did not even look at the fluid, just said to leave it alone at this point. The suggested "staggered" approach makes sense...to let the transmission acclimate to the new fluid more gradually. I'll go with that. My independent Volvo me...

2006 XC90 AWD, 5-speed transmission 13 y/o car but relatively low mileage for such age, 155K I only changed the transmission fluid once in the past at 50K…that was 10 years ago. I understand that Volvo official guidance is “lifetime” fluid and no changes under regular usage, but I also read that it ...