joronamo Apparently that's no good for the car.
For some old cars yes, you need to use valve saver fluid when using unleaded. But all Volvo 240s no matter now old run fine on unleaded, but as Greg said, you might need to use 95 or 98 depending on the model.
My 1992 240 with LH2.4 would run just as well and use the same amount of fuel on 91 or 98 so it just depends on the car really
