It's time to change the fluid in my 6-speed manual, 04 S60R but I can't find out how many quarts or liters going to take. Anyone have an answer on that one?

And what are your thoughts on going Volvo fluid vs Castrol Synchromesh vs Royal Purple Synchromesh. I'm hearing mixed reports on which way to go here.

Thanks.

 

your car uses synthetic GL4 75 - the owner manual shows 2.1 or 2.2 quarts (2-2.1L) for both the M56 and M66 tranmssions. Given its 2 liters and the factory fluid is already synthetic, I'd just go Genuine Volvo for about $18 per - its probably Castro synthetic relabeled. Stick to GL4 synthetic fluid as some of the GL5s have agents which can harm the brass synchro rings. Is your model AWD?

 

Yes, it's AWD.

Sometimes, I get too caught up in googling everything and I never thought to look in the owner's manual. Of course the information is right there.

Thanks. For $36 (2 quarts), I'll just pick up some genuine Volvo fluid......

 

pretty sure the AWD has the M66 so you may need the extra quart to get that .2...