Volvo 2007 S80 Owner's Manual page 236

246
06 Maintenance and specifications
Specifications
Engine oil
Engine oil must meet the minimum ILSAC specification GF-3, API SL, and ACEA A1/B1. Lower quality oils may
not offer the same fuel economy, engine performance, or engine protection.
Volvo recommends oil products.
Depending on your driving habits, premium or synthetic oils may provide superior fuel economy and engine
protection. Consult your Volvo retailer for recommendations on premium or synthetic oils.
Oil additives must not be used.
Synthetic oil is not used when the oil is changed at the normal maintenance services. This oil is only used at customer
request, at additional charge. Please consult your Volvo retailer.
Oil viscosity (stable ambient temperatures)
Operation in hot climates
When temperatures exceed 86° F (30° C) in your area, Volvo recommends, for the protection of your engine, that you
use a heavier weight oil, such as such as SAE 5W-40 or 0W-40. See the viscosity chart.