Did you get that estimate from a dealer?

If so, have then get maintenance records for you. They may not be compete but they may be instructive, if there is none, they previous owner may have never gone to a dealer.

There may be a tag on the cover that tells when the timing belt was changed. When they change your timing belt, have them change the seals on the engine at the same time - cheap insurance.

At the least, change your oil to a synthetic.

Also consider a SLOW tranny fluid change - have them drain the pan and top off the tranny with new fluid. Do this at each oil change until the fluid looks good. I do not recommend a tranny flush - sometime a flush on an older car causes tranny troubles. Also, I once went for a flush at my dealer and they did not drain the pan first, so after an expensive flush, the fluid was still dirty! They had to do another flush.

If you have a dealer do an oil change ( $$$ ) you will get a report on various items tested on your car - you might look at a copy of this report before you ask for the oil change to see if you think it is worth the price.

My dealer will check out a car for purchase and charge one hours labor.

A dealer should be able to help you prioritize the work you may need.

Welcome!

THe astronomical service estimate isn't all that surprising. Really, it's a good thing you didn't get that done beforehand, otherwise you probably wouldn't be the lucky owner of such a fine luxury auto! Hopefully you're prepared to chip away at the deferred maintenance. Definitely check the car's records for a timing belt change. If it hasn't been done then I'd do it SOON. Relatively straightforward job since it's right there up front.

RE: Engine flush, there's opinions abound. It's generally accepted around here that Synthetic oil is a must and doing shortish (3-5K mi) change intervals on that is a good way to chip away at any old sludge. Me, I'd pick the engine flush used by my current favorite YouTube mechanic and apply per the instructions on the label.
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XC60 / Odyssey

Hi Eastbay,

$9500 estimate? Yikes! Did you get that estimate at Mafia Motors?
Hopefully you went somewhere else for a second opinion, before you suffered
cardiac arrest.
You might post that estimate so that we can all be amused.

Did you get the service records from the previous owner?
You'll want to know when the timing belt was replaced, also you'll want to
get the mileage off of the computer and see if it's the same as the odometer.

Someone else can comment if they have a good idea for an engine flush.

Dyno oil is poison in the Volvo white block engines, and dyno oil clogs up the EGR and cylinder head too with a hard crusty crap. The clogged EGR can raise crankcase pressure causing failed engine seals. Plugged cylinder head oil galleries are bad news also.

When I went back to the 940 B230FT I switched to Full synthetic oil, and it is cleaning out this engine gradually. So my suggestion is to decide on what flush or treatment you will do, followed by using only Full synthetic oil.

Good luck, Bill