I have the 2.5 L Turbo version of this model. Recently, it has been running very sluggish. I just had an oil change 500 miles ago, and I alternate between 89/91 grade oil per tank fill up. The manual states that higher grade gas is not a requirement for engine reliability. However, the way it is driving now, it's almost like it isn't a turbo at all. I made an appointment at the Volvo dealership here in Vegas. I see exactly what is going to happen. There will be something wrong with the transmission, and they will say it is because I am not using 91 gas. They already tried to tell me over the phone that 91 was REQUIREMENT for the engine, not a suggestion from the manufacturer for better performance. Now it could also be because it's very hot right now in Vegas and I know that switching to a higher octane in hot weather can sometimes help. Anyone else having this issue?
Do you have to use premium gas in the turbo? on 2009 Volvo S60
by ejholloway in Los Angeles, CA on June 01, 2012