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A turbocharger system can include a housing that includes a bore defined at least in part by a bore wall; a rolling element bearing unit that includes an outer race; and a mixed-element damper assembly disposed at least in part between the outer race and the bore wall where the mixed-element damper

A turbocharger system can include a housing that includes a bore defined at least in part by a bore wall; a rolling element bearing unit that includes an outer race; and a mixed-element damper assembly disposed at least in part between the outer race and the bore wall where the mixed-element damper assembly includes a lobed-spring element and a squeeze film damper element.

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1. A turbocharger system comprising: a housing that comprises a bore defined at least in part by a bore wall;a rolling element bearing unit that comprises an outer race; anda mixed-element damper assembly disposed at least in part between the outer race and the bore wall wherein the mixed-element da

1. A turbocharger system comprising: a housing that comprises a bore defined at least in part by a bore wall;a rolling element bearing unit that comprises an outer race; anda mixed-element damper assembly disposed at least in part between the outer race and the bore wall wherein the mixed-element damper assembly comprises a lobed-spring element and a squeeze film damper element and wherein the squeeze film damper element comprises a squeeze film damper ring element. 2. The turbocharger system of claim 1 wherein the lobed-spring element comprises radially inwardly extending lobes. 3. The turbocharger system of claim 2 wherein the squeeze film damper element is disposed at least in part radially between the radially inwardly extending lobes and the outer race. 4. The turbocharger system of claim 1 wherein the lobed-spring element comprises radially outwardly extending lobes. 5. The turbocharger system of claim 4 wherein the lobed-spring element comprises radially inwardly extending lobes. 6. The turbocharger system of claim 4 wherein the radially outwardly extending lobes contact the bore wall. 7. The turbocharger system of claim 1 comprising at least two lobed-spring elements. 8. The turbocharger system of claim 7 wherein at least two of the two lobed-spring elements differ in lobe shape of radially inwardly extending lobes. 9. The turbocharger system of claim 1 wherein the squeeze film damper element comprises a lubricant opening. 10. The turbocharger system of claim 1 wherein the squeeze film damper element defines a low pressure squeeze film space and a high pressure squeeze film space. 11. The turbocharger system of claim 1 wherein the mixed-element damper assembly comprises keys and keyways that orient the lobed-spring element with respect to the squeeze film damper element. 12. The turbocharger system of claim 1 comprising an end cap that is coupled to the lobed-spring element that is coupled to a spacer that is coupled to another lobed-spring element. 13. The turbocharger system of claim 12 comprising another spacer that is coupled to the other lobed-spring element. 14. The turbocharger system of claim 1 wherein the lobed-spring element and the squeeze film damper element comprise compressor side elements and further comprising another lobed-spring element and another squeeze film damper element that comprise turbine side elements. 15. The turbocharger system of claim 1 wherein the lobed-spring element and the squeeze film damper element act in series. 16. The turbocharger system of claim 15 comprising another lobed-spring element that acts in parallel to the in series elements. 17. A turbocharger system comprising: a housing that comprises a bore defined at least in part by a bore wall;a rolling element bearing unit that comprises an outer race; anda mixed-element damper assembly disposed at least in part between the outer race and the bore wall wherein the mixed-element damper assembly comprises a lobed-spring element and a squeeze film damper element and wherein the squeeze film damper element defines a low pressure squeeze film space and a high pressure squeeze film space. 18. A turbocharger system comprising: a housing that comprises a bore defined at least in part by a bore wall;a rolling element bearing unit that comprises an outer race; anda mixed-element damper assembly disposed at least in part between the outer race and the bore wall wherein the mixed-element damper assembly comprises a lobed-spring element and a squeeze film damper element and wherein the mixed-element damper assembly comprises keys and keyways that orient the lobed-spring element with respect to the squeeze film damper element. 19. A turbocharger system comprising: a housing that comprises a bore defined at least in part by a bore wall;a rolling element bearing unit that comprises an outer race; anda mixed-element damper assembly disposed at least in part between the outer race and the bore wall wherein the mixed-element damper assembly comprises a lobed-spring element and a squeeze film damper element and wherein the lobed-spring element and the squeeze film damper element act in series. 20. The turbocharger system of claim 19 comprising another lobed-spring element that acts in parallel to the in series elements.