Originally Posted By: sicko
If you plan on using synthetic, I'd use the 0w-20 you use for your Honda. If you plan on using conventional, I'd use 5w30 and would switch the Volvo over to 5w30 to simplify things.
My thoughts exactly ^
OP That engine was back spec'd to 5w20. you can use 5w20 or 5w30 without issue. You could also use the 10w30 you use in the Volvo if you wanted to go that route. The 3.3/3.8 engines are pretty decent engines. Also 127k isn't really high mileage if its been remotely maintained. If you wanted to run synthetic i doubt you would have any issue.