Bought Amsoil synthetic 5w30 for the wifes Toyota Landcruiser. Truck has 120K miles on it and she drives it around 8K-10K miles per year. I have alway used Mobil 1 5w30 and changed it every 5K - 7K miles. Would I use the same change interval that I did with the Mobil 1? or would you run it longer with just filter changes at 5K mile intervals?
Thanks
Thanks